If you can get ahold of a simple delay effect, try putting the guitar all in one side, but the delay (one tap, no reverb, 30ms delay) of the guitar in the other side. Keep drums, bass, and vocals in the centre.
I used to record bands with a 4 track and I would often record:
1- guitar1
2- guitar2 (play the same thing again)
3- bass
4- drums
Then mix down to a cassette (or now a computer would probably be WAY better) so that the instruments are mixed down to two tracks as:
Guitar1 - Left
Guitar2 - Right
Bass - Centre
Drums - Centre
Then overdub vocals onto the remaining two tracks so the next bounce looked like:
1- Left channel band mix (panned all the way left)
2- Right channel band mix (panned all the way right)
3- Lead vocal (panned 15% left)
4- Backing or doubled vocal (panned 15% right)
It sounded a lot better than the simple 4 tracking with one guitar. It's totally a safe way to mix a track because no matter where you're listening to it, it's going to sound fairly decent. If you hard pan instruments, they may get lost if the person is listening to the music through a mono system (like some bar PA's).