This is something i stumbled accross a while ago, and couldn't find it again, i recently put my old computer back together, and here it is:
http://freewebs.com/hctreason/fileview.tar.gz
What it is is FileView, sadly it was abandoned, what it does is open these filetypes:
.GRP .RFF .CMP .WAD .PAK .CK1 .CK2 .CK3 .CK4 .CK5 .CK6 - in fact it opens most game files, i wasnt going to share it with anybody, but here it is.
IT HAS TO BE EXTRACTED TO C:\Program Files\FileView\ - Read the Readme for the reasons and stuff
Unfortunately i can't find the original site
