If you find the task is failing on 3.6 RSA with drivers. Try this.

Make a new postinstall task using Runtime Environment: K2000 Boot Environment (Windows)

Then upload copy_drivers.vbs from the peinst/hta/ folder call it

cscript.exe copy_drivers.vbs save it

Add to the mid leve task.

Troubleshooting Steps.

Check drivers are synced under the rsa share \\rsa\peinst

Make sure Use driver feed (only with Sysprep'd images) is checked and save sync