It pops up asking me for the location of "wdfcoinstaller01005.dll" and when I click browse it takes me to the correct location, however it cannot see the file.
If I use the Dell install disks to perform the install it goes through no problem and the Network cards installs.
In answer to your question, I have to wait until the OS is finished building then I am able to manually install the drivers using the files in the driver pack.
I am having no issues with any other hardware combination, just the NetXtreme II card with 2950.
The file in question, "wdfcoinstaller01005.dll" is part of the Windows Driver Kit.
I might look at writing my own driver for this card. Unless anyone has any suggestions for this.