Seems to be a MS tool which is installed by default in Windows XP which can set registry permissions. I have seen this mentioned as a possibility. Please let me know of any details if you use it.
WINXP installs an old version of this tool, grab the latest from the MS site.
usage: REGINI [-m \\machinename | -h hivefile hiveroot | -w Win95 Directory] [-i n] [-o outputWidth] [-b] textFiles... where: -m specifies a remote Windows NT machine whose registry is to be manipulated. -h specifies a specify local hive to manipulate. -w specifies the paths to a Windows 95 system.dat and user.dat files -i n specifies the display indentation multiple. Default is 4 -o outputWidth specifies how wide the output is to be. By default the outputWidth is set to the width of the console window if standard output has not been redirected to a file. In the latter case, an outputWidth of 240 is used. -b specifies that REGINI should be backward compatible with older versions of REGINI that did not strictly enforce line continuations and quoted strings Specifically, REG_BINARY, REG_RESOURCE_LIST and REG_RESOURCE_REQUIREMENTS_LIST data types did not need line continuations after the first number that gave the size of the data. It just kept looking on following lines until it found enough data values to equal the data length or hit invalid input. Quoted strings were only allowed in REG_MULTI_SZ. They could not be specified around key or value names, or around values for REG_SZ or REG_EXPAND_SZ Finally, the old REGINI did not support the semicolon as an end of line comment character. textFiles is one or more ANSI or Unicode text files with registry data. The easiest way to understand the format of the input textFile is to use the REGDMP command with no arguments to dump the current contents of your NT Registry to standard out. Redirect standard out to a file and this file is acceptable as input to REGINI Some general rules are: Semicolon character is an end-of-line comment character, provided it is the first non-blank character on a line Backslash character is a line continuation character. All characters from the backslash up to but not including the first non-blank character of the next line are ignored. If there is more than one space before the line continuation character, it is replaced by a single space. Indentation is used to indicate the tree structure of registry keys The REGDMP program uses indentation in multiples of 4. You may use hard tab characters for indentation, but embedded hard tab characters are converted to a single space regardless of their position Values should come before child keys, as they are associated with the previous key at or above the value's indentation level. For key names, leading and trailing space characters are ignored and not included in the key name, unless the key name is surrounded by quotes. Imbedded spaces are part of a key name. Key names can be followed by an Access Control List (ACL) which is a series of decimal numbers, separated by spaces, bracketed by a square brackets (e.g. [8 4 17]). The valid numbers and their meanings are: 1 - Administrators Full Access 2 - Administrators Read Access 3 - Administrators Read and Write Access 4 - Administrators Read, Write and Delete Access 5 - Creator Full Access 6 - Creator Read and Write Access 7 - World Full Access 8 - World Read Access 9 - World Read and Write Access 10 - World Read, Write and Delete Access 11 - Power Users Full Access 12 - Power Users Read and Write Access 13 - Power Users Read, Write and Delete Access 14 - System Operators Full Access 15 - System Operators Read and Write Access 16 - System Operators Read, Write and Delete Access 17 - System Full Access 18 - System Read and Write Access 19 - System Read Access 20 - Administrators Read, Write and Execute Access 21 - Interactive User Full Access 22 - Interactive User Read and Write Access 23 - Interactive User Read, Write and Delete Access If there is an equal sign on the same line as a left square bracket then the equal sign takes precedence, and the line is treated as a registry value. If the text between the square brackets is the string DELETE with no spaces, then REGINI will delete the key and any values and keys under it. For registry values, the syntax is: value Name = type data Leading spaces, spaces on either side of the equal sign and spaces between the type keyword and data are ignored, unless the value name is surrounded by quotes. If the text to the right of the equal sign is the string DELETE, then REGINI will delete the value. The value name may be left off or be specified by an at-sign character which is the same thing, namely the empty value name. So the following two lines are identical: = type data @ = type data This syntax means that you can't create a value with leading or trailing spaces, an equal sign or an at-sign in the value name, unless you put the name in quotes. Valid value types and format of data that follows are: REG_SZ text REG_EXPAND_SZ text REG_MULTI_SZ "string1" "str""ing2" ... REG_DATE mm/dd/yyyy HH:MM DayOfWeek REG_DWORD numberDWORD REG_BINARY numberOfBytes numberDWORD(s)... REG_NONE (same format as REG_BINARY) REG_RESOURCE_LIST (same format as REG_BINARY) REG_RESOURCE_REQUIREMENTS (same format as REG_BINARY) REG_RESOURCE_REQUIREMENTS_LIST (same format as REG_BINARY) REG_FULL_RESOURCE_DESCRIPTOR (same format as REG_BINARY) REG_QWORD numberQWORD REG_MULTISZ_FILE fileName REG_BINARYFILE fileName If no value type is specified, default is REG_SZ For REG_SZ and REG_EXPAND_SZ, if you want leading or trailing spaces in the value text, surround the text with quotes. The value text can contain any number of imbedded quotes, and REGINI will ignore them, as it only looks at the first and last character for quote characters. For REG_MULTI_SZ, each component string is surrounded by quotes. If you want an imbedded quote character, then double quote it, as in string2 above. For REG_BINARY, the value data consists of one or more numbers The default base for numbers is decimal. Hexidecimal may be specified by using 0x prefix. The first number is the number of data bytes, excluding the first number. After the first number must come enough numbers to fill the value. Each number represents one DWORD or 4 bytes. So if the first number was 0x5 you would need two more numbers after that to fill the 5 bytes. The high order 3 bytes of the second DWORD would be ignored. Whenever specifying a registry path, either on the command line or in an input file, the following prefix strings can be used: HKEY_LOCAL_MACHINE HKEY_USERS HKEY_CURRENT_USER USER: Each of these strings can stand alone as the key name or be followed a backslash and a subkey path.