Install a class filter driver in WinPE 2.0

[salvarez]

I have a class filter driver that uses a .sys and .dll file to control writes to ALL drives (permanent and removable), and I need to install it in PE 2.0 so that it loads as early as possible in the boot sequence. In PE 1 I modified the txtsetup.sif file, but how can I do something similar in 2.0? The peimg /inf command seems like it will load the driver too late!