Need to pre load the LSI SAS drivers using WinPe. I am not sure what files to edit, winpeoem.sif, txtsetup.sif etc..

Attempted so far with the ISO:
1.Created a folder with SAS driver and placed them in bin\system32\lsi_sas
2.Edited winpeoem.sif at \BIN\I386\system32
[OemDriverParams]
OemDriverRoot=""
OemDriverDirs=LSI_SAS
3.Edited txtsetup.sif at \BIN\I386 Not quit sure what to update there but tried a few things. No luck yet!

With everything I have attempted above it appears the OS is brought down and then the server reboots to continue installation. There is a point where I can do F6 to install the driver which I have tested and it works but I want to avoid the whole F6 method and do it unattended. I am not sure where I need to add the LSI_SAS drivers on the server so it will be pnp to be recognized.

Any ideas would be appreciated?