there is one more factor. if your bike came with a suspension fork you need a 'rigid' fork that is designed for a "suspension ready" frameset. since the distance from the axle to the crownrace is longer on a suspension fork, alot of MTBs (esp the ones sold with susp forks) the geomentry was changed to correct for 3 to 5 in difference in stand over height.
you may want to measure your limp fork with your friends rigid ones. *giggle* and see if the one on Ebay will work
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk