I tried fruityloops, it scared me because of all the channels and midi instruments etc, then I remembered I found this easy to use one ages ago called DrumAtik. Heres a screenshot to show just how simple it is:

Basically (if you couldnt allready guess) you just click the little buttons and they light up meaning the sample is activated for that beat.. and you can import wav samples down the side. However its a bit limited, I cant seem to get any fast double bass style beats on it, and "only" goes to 200bpm.
I'd just like something like that, which like goes on forever if you know what I mean, so I could create a drum track for a whole song with that screen, as at the minute it just loops these 4 bars..
Any help is GREAT, cheers.