You might also try rolling off the guitars and bass guitar frequencies somewhere around 60-150hz (for guitar) and 50-20Hz (for bass guitar) with your EQ. SOMETIMES it makes all the difference. Sometimes it doesn't. You're definitely gonna need a better mic for the bass drum and I've found the MXL 990 to be both very cheap ($69.00@ M.F.) and able to reproduce my personal "dream bass drum" sound with little effort and instantly made my SM57/58's sound like toys. You can always use a better mic but that's just a suggestion if you're really tight on cash. I think all the difference is in the larger diaphragm condensor for reproducing all the frequencies accurately. The mic you use makes all the difference.
This is also where certain tuning of the bass drum heads and proper dampening can make or break your sound. If you have the head tightened up and padded down too much, you're not gonna get much of a good sound on any style of music, so play with tuning and dampening to get a good sound going in to the mic FIRST and then hit record. The key is to experiment, experiment, experiment until you get a reproduceable and workable sound every time.
If getting a different mic and re-recording is not an option, you *might* bring out the bass drum with a harmonic exciter and aural exciter in combination with the EQ roll-offs on the other instruments as outlined above. Also, light compressors/limiters help to tame the fickle volume spikes to a manageable point where you can bring the overall track level up a little more.
Sometimes when I run into this predicament, it depends on what order you're mixing the instruments. If you're mixing around the guitars first, then good luck getting your drums to fit in there somewhere. Guitars can quickly dominate all the available frequencies if you focus your mix on them first, so "mix-up" the order in which you mix everything by bringing down all faders and try mixing around different instruments first (e.g- drums then guitar, then bass etc..). Somewhere within all the suggestions here and within the replies to your post, you should be able to find a better sound.
It just doesn't matter how the guitarists tune their guitars. NEVER change the tuning to satisfy the recording process. That's like telling a Nascar driver to "slow it down" to save on gas consumption....
If you had a clip, it'd be alot easier to judge what needs to happen. Post a link to your clip up here and I'm sure you'll get plenty of further help.