Chrisjob's mike placement is a good one. You also may want to try these things out as well:
-You said you recorded the drums in the basement. If you record the guitar in there as well, you will have twice the reverberation, which will really start to clutter things up. Get a cheap carpet to place the amp on. Get some blankets and try to cover the space so that the reverb is minimized as much as possible. The key is to have as much reverb absorbed by the blankets as possible. You want a drier guitar sound. You already have the reverb from the drums, so you are NOT going to need reverb for any other instruments except maybe the vocals.
-If you are recording with a typical guitar amp (as opposed to a cab), then get the amp off the floor so that the overall sound dispersion gets captured as opposed to waves bouncing off your floor.
-Reduce the gain. Too much gain really clutters up the tone of the instrument, especially when you are recording more than one guitar at a time.
Cy