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so, the soundscan loops that come with machfive..can the tempo be changed for them? if so how. i made a quick test and recorded some keyboard sounds at 120bpm and then wanted to throw on one of those drum loops but they don't match up.

No, they can't change the tempo. May be the next version of Mach5 can.
In the meantime, you have to export the loops to Recycle and slice them up.
Now you can use them in many sequencers.