This is the specifications for the archive file which is handled by the Game Extractor plugin Archive_INS.

Endian Order:	Little Endian
Compression:	Unknown
Encryption:	None

This format is used by the following Games:

Redneck Rampage

*.grp *.ins

This is the format specification information:

4 - Unknown 4 - Unknown 2 - Unknown 4 - Unknown 2 - Unknown // for each file 4 - File Size (for first file, skip 3 bytes then read the 4 byte number. Remember to subtract 3 off the next field too!) 4 - Unknown 4 - Unknown 2 - Unknown (null) 4 - Unknown (32) X - Filename (null) X - File (compressed)

Game Extractor is able to read files of this type, as well as files from thousands of other games. To give it a try, download Game Extractor (Basic Version) for free, and see what it can do.

For further information on this format, refer to the source code on our GitHub repository.