A precise eq could do it as well. One with adjustable Q. [bandwidth]

Solo the drums and rank the levels a bit and adjust the Q to a very sharp peak or to be very small if you don't have graphic effects. Then sweep the freqs in the area of 8 to 10 k. When they get ugly that's the freq to cut. With a good sequencer you can automate this cut so it only hits the crashes and leaves the rest alone. Bring it down gradually till you find a good compromise. Without mastering gear and Al Schmidt's skill, most things of this nature are not perfect. But you will probably be the only one to notice the change if you do it right.

Ron

`15 Audiophile, Toshiba17", 3Mhz, 4gig ram, 500gig HD, Win7, Tascam 122mkII interface, Tascam 16 track 8 buss recording mixer, 2 Avalon747sps,CAD VX2 mic, AKG C1000s, mac and Digital Performer.