If you know the chipset of your laptop, you can then DL the proper chipset/mass storage driver from the manufacturer's webpage and slipstream the INFs included in that one.

OR you could use our DPMS and have virtually all INFs provided already.
I just don't think they work well with nLite as the txtsetup.oem files have been stripped, but they do work if you use BASE after nLite (read our guides/tuts!).