Whats the best way to record in a garage ?
like digital camera?..video camera?...microphone hooked up to a computer?
get some kind of recording stuff hooked up to a computer, if u cant afford that find some type of high quality tape recorder or something like that
audacity, with a computer mic

sorry, that post was a little blunt, audactiy is a recording program you can download from download.com and basiclly you just set your amp up infront of the computer mic, hit record and start playing, its really really great
My Rig:

Fender Telecaster
Epiphone Es-335 Deluxe
Line 6 Flextone 3 XL
Norman B-50
1980 Fender Acoustic

I record Line in with a distortion pedal through audacity, you get a real full sound. Sometimes I run my head Line out in to the comp too they all sound good, but I don't like the sound of a comp mic.