What are you trying to do? Just record a guitar part and then save it as an appropriate file. Then take that file and add it to your loops library = a recorded guitar loop. Are you looking for pre-recorded guitar loops?
PM Me for any help you need with recording systems/tips
Quote by BrianApocalypse
Good call

Man, you should be a mod, you know everything.

if you have a guitar you could get an octave pedal and turn down to create some bass. It works ok and it's what I do for my songs.

but yea as Thrice stated we need to know what you are looking to do before we can give you some good, useful advice.

I think you are looking for software that will allow you to create guitar, bass, drums and all that though the computer. The only way I know to do that is midi control and some good software. But I don't do that type of thing so there could be products out there that I don't even know of that would work for you.