What are the current tooth counts on your rings?
Looking at bikeapedia.com, the range of ring sizes for your brand and model ran from 28-38-48 to 22-32-42 for the 3 I checked.
http://www.bikepedia.com/QuickBike/B...line&Type=bike
You might possibly have clearance issues if say, your bike is equipped with a 42T big ring. Better to check that out first. You might also have FDER issues if you have no vertical adjustment on the FDER.
Personally, if the BB is good, I'd just look for a lower cost sq. taper crank set. Youur bike has relatively lower end parts and it just seems like too much money for what you want to do.
IF you want a cheap 28-38-48 sq, taper crank with SHORT arms, see-
http://www.nashbar.com/profile.cfm?c...20ATB%20Cranks