Empire Earth and its .cabs?

[name]

Hi,
I'd like to make a backup of Empire Earth, by making an Image-file, opening it with ISOBuster and then I would like to open the 2 data.cap-files with WinZip or something like that. (I think in this .cabs the GAME.exe file is. I would like to change it to a NO-CD exe and then by installing the game, the NO-CD Patch will be installed automatically.) BUT, WinZip says: "cannot open C://blabla/blabla/FILE.cab because it is not in the standard Microsoft Cab format (as defined in mid-1998) The signature bytes required by the Microsoft CAB specification are missing.

So what now???

If you can, please help

thx
name