Few of the newer FPS games that I have such as Shadow Warrior 2013 have controller support, but this game I think came out in '04 which I am unaware (not saying it isn't possible - I just don't know, and never looked as I am a mouse + keyboard type) if older FPS games have controller support other than a joystick (which worked in Quake III Arena for example).

You can try Xpadder and see if that works for you. The current version isn't free, but I think the older versions are, and I would think should work. Can't say for sure as I don't use it, but judging by what I have read around here I don't think there would be any harm in trying.

Hmm Im really surprised to find out there is little support for controllers with fps games, I can understand why though when i think about it. Thank you for pointing me in the direction of xpadder. I guess it should work on anything but maybe not with games that have a more extensive list of commands. Saying that will prob have a go at giving out some 'wrath of god' the old fashioned way with this game - keyboard/mouse and find some other non-necessarily shooting games that do support control pads.
Thanks!

A bit late here but I have the same problem, I just simply prefer controllers for gaming in general. Its only in the last few years where PC games have started to have native controller support so in most cases a program like Xpadder or joy2key (the one i use) which basically lets you assign buttons to any of the keys/ mouse stuff. After a bit of fiddling you can get most older pc games controlling very well. At the times when there are too many keys in the game I just assign the most important to the controller EG. movement, looking, shooting/reloading and weapon scrolling. Anything left can still be used on the keyboard so just make them something memorable :)