It's usually best to record drums to separate tracks for the best possible control at mixdown. For example, in rock mixes bass drums are usually left pretty dry, but snares often have a fair amount of reverb on them. If the drums are all together in one track you can't be very selective about the processing you apply.
However, with one mic and one stereo input to the soundcard, you can't do this unless you can play each part of the kit completely seperately in multiple passes -- just the kick, then just the snare, then just the hi-hat, etc.