Is it something you extracted from a game or closed system? If so, you'd have to look to see if anyone developed a process or software for extracting from it. Otherwise, you might have to develop it yourself.I should have said this earlier but I forgot to include it in the original post: It is an archive for use with a program. It does not follow conventional archive format, nor is it actually a OS X package. I was hoping someone could direct me towards a way to detect archive format, since it is not following traditional models (bzip, tar, zip, rar, 7z). The archive was created in late 1999 if it helps.