Okay, so counting down to 0 from value d0, then warping to 0,0 would be:

LOOP WAITFRAME
SUBV d0,1
COMPAREV d0,0
GOTOMORE LOOP
WARPR 0,00

Correct? I'm sortof new to Zasm...

EDIT: I tried compiling the above script, but it says the first argument is incorrect for WARPR. Is it the Dmap number or the Dmap name?