It is possible
You need to run a SRAM shifter and space out where the cable bolts to teh mech by exactly 6mm to get the pull ratio right.
I did this last week and it survived Sticks descent down Helvellyn at the weekend, cable pulled through once but that was my fault for not wrapping the cable around the spacers (washers) to get a good purchase.
Only thing i dont like is SRAM shifters. X7 used and the up lever was getting stuck behind the down lever so ive cut a bit off.
Its not a bodge, it works perfect and someone has actually taken the time to reverse engineer the pull ratios. Its actually 0.236″ or 5.99mm that you need to space it out (depending on how anal you are)
So in short, works exactly as it would with a shimano 10spd shifter but you have 9 gears!