How hard is it to completely remove a fretboard?

[Lincoln]

How hard ( how much? ) is it to remove a fretboard and apply a new one that is a completely different wood?

[Johnny Crab]

http://www.projectguitar.com/tut/removal.htm
http://www.dbeweb.com/guitar/
http://cathedralguitar.com/Perf/doubletop/

Tools and know-how also live here: http://www.stewmac.com/freeinfo/

If I were wanting to do this, I'd practice on cheapo or free(read:Junk) basses first before working on one I valued.