Topic: No mouse during install (Dell 4600)

I have slipstreamed XP Home and SP2 with all driverpacks but i have noticed that during install there is no mouse present, previos installs always let me use the pointer to make selections during the installs.
The mouse do become installed after the installations is complete.
But is there something i'm doing wrong ?
i'ts an USB mouse.  It has be caused by the Chipset driverpack.

Please advise.

btw. great site!