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[mesterak]

I have been able to create the bios update from the Dell Client Configuration Utility and flashing the modded hdr file. However, does anyone know how to run that .exe without windows? My PC that I'm modding is solely used for NAS, and I have tried running DOS, and unfortunately it cannot run the bios mod exe... Any suggestions?

You could try using Rufus to create a bootable FreeDOS USB stick, put the generated EXE on it, boot to the USB stick and run the EXE on the command line. You're only other option would be to use WintoUSB to have fully functional Windows install (XP or Win7 will work) on a USB stick so you can run the EXE in Windows...you will need a 16GB or preferably 32GB USB stick for this second option. Hope this helps.