From what I've seen, if a login script maps drives, a program run from the Run or RunOnce keys does not see these drives. (different from NT/2k behavoir).
Tossing a test program in the Run key that times how long it takes until a mapped drive is avail it seems to take about 9-10 seconds AFTER the run key is run.
The login script program sees the mapped drive fine.
Does anyone know of a reg setting to make the Run keys exhibit their previous behavoir?