You'll probably find that in this genre, an acceptable mix uses a LOT more compression than you're used to, and on instruments you wouldn't normally put any on, and in techniques (serial and parallel compression) you wouldn't normally consider for jazz.
Same goes for EQ. Someone mentioned these tracks shouldn't need much EQ but I disagree. Some of them need subtle changes (a couple db here and there on the drum overheads, for example), but some have such a DRASTIC tone problem (bass, kick, snare) that up to 10db boosts/cuts are needed to get anything useful out of them.
IMHO in this genre you just have to do what sounds good and not think about that it may be "wrong" to do it. If crazy EQ makes it sound better, then you just do it and forget about any rules.
Also, pan wide. Overheads and guitars at full L and R.
Compress the crap out of those cymbals.
And don't be afraid to completely trash some of the tracks. I got rid of half the extraneous bass and drum tracks because they didn't add a damn thing.
Replacing lacking tracks with different tones is also common practice. I "reamped" most of the guitar and bass tracks and used my own drum samples.