Good morning Metzen, I appreciate your instructions, I was able to create a custom OPK cdrom with nForce4 network support. I stumbled a little on some of the commands, since I'm not a windows propeller head (prefering embedded development, where I mostly create my own headaches). I was, however, successful on the 1st CDROM burned. While sifting through the working computer's registry, there appear to be quite a few other registry keys related to nVidia networking and/or netbus. I ignored them, and worked with the 4 Metzen had indicated. At step 11, I'd add run regedit.exe, highlight the HKLM key (otherwise the import menu item is greyed out) and import the setupreg.hiv file (via File, Import). Regedit will ask for a new key name, this is where you select PE_SYSTEM, which keeps your existing SYSTEM hive isolated. For step 13, I'd add the steps to import the inf files (this worked the first time, but the driver disk I have has LOTS of win2kxp driver folders, maybe they all work, I didnt' try) For my system, tools are in the following locations: c:\winpe - the folder where the OPK "build-in-progress" lives c:\build_x86 - the folder where the OPK build tools live d:\ - location of the ASUS nForce4 driver CDROM cd \winpe drvinst.exe /inf:D:\Drivers\Chipset\WINXP_2K\Ethernet\nvnetbus.inf c:\winpe REM the next command will prompt to overwrite one file, select 'yes' drvinst.exe /inf:D:\Drivers\Chipset\WINXP_2K\Ethernet\nvenetfd.inf c:\winpe REM now build the PE image into an ISO image oscdimg -bc:\build_x86\etfsboot.com -n c:\winpe c:\winpex86.iso Burn to CDROM and boot away. Once booted, the old "net" commands are handy: net use F: \\MfgServer\OPKTools Thank you again! (attached registry files are from XP Professional, SP2, Asus A8N-E) (not enough space to attach a zip of the nForce files, sorry) NVNET1.REG NVNet2.reg NVNet3.reg NVNet4.reg