I've just started to record using Ardour, which looks like a fantastic bit of software and when I have a spare couple of lifetimes, I think I will set about learning how everything works

...but in the meantime, I've been playing around with it making a few short recordings to try and learn enough to get me going.
I have found though that I can record one audio track fine, but have to change to the next input (2) in my breakout box to record a second, then move the jack to the next input (3) to record a third.
I only have 4 inputs. Is it not possible to record say, the guitar (in input 1) in audio track 1, and the same guitar (in input 1) to an audio track 2 while playing back audio track 1?
This is quite restrictive in as much as I will only have 4 tracks to play with if this is the case. I'm sure I must just be doing something wrong (I hope so!).
Thanks,
dchurch.