that worked like a charm
here is the info from that site- (iv edited it because it was badly written)
Many iPad users running iOS 4.2.1 are having problems with installing FullForce and other apps onto their devices in Cydia, where they’ll get some sort of “gsc.wildcat” dependency error. This fix is VERY easy and VERY quick.
So, open iFile or any file browsing program, and navigate to /System/Library/CoreServices/SpringBoard.app, and open “K48AP.plist” as text viewer. Look at the screenshot below, and add a new key called “wildcat”, and make it true. Save the file, reboot your device, and try the install again.