okay, im not major sound company but im going to give you a small tip cause i have recorded on a POS computer for friends before and sounded alot better, what you need to do is record the song by itself from each member of the band independently and then layer them ontop of one another this way you can kill the volume of each instrument individually to make it sound the most pleasing.
it's like having a sound board right there your friend on the drums may have to be at 50 percent volume compared to the rest of the instruments so that everyone else can be heard.
just an idea, there are many programs out there that will let you do this. but you guys do rock anyways

good job.