Okay this is what I thought ... When OemPnPDriversPath is set, the F6 function doesn't work, in fact loading drivers in txtsetup part is okay, but in GUI part it say "not found" because setup search in defined path, this is my opinion. I havn't find (and search too ^^) some solutions for me, I use regular install in that case. For U, you can integrate your sata drivers and problem will be solved. Search in Device Drivers / BashratPack sections. Goodbye.