I'm picturing a spider crawling up a wall, but you want to have your spider "walk" without actually moving up the wall...
It MIGHT work.
Are you trying to have an avatar walk on a treadmill? (Walk, but don't actually go anywhere.) Hmm... I'd have to play with that to see what works.
If you want to place bets, I'll put my money on Cricky's method. It sounds more official (and he's pretty good at this stuff.)
Please let us know what works, and good luck.