I've made some tunes via Propellerheads Reason and i'd like to add a guitar on to said tunes.
The guitar however is my mates and I thought I could just give him my laptop and lay down some guitar on top.

I've got no idea how to go about this to be honest. Is it a simple case of plugging into the laptop with an adaptor?
I've got a microphone if that makes it easier!

Any help would be grand.