Hey, I think I've got this figured out but I just want to make sure I do. So I have a Dell XPS One (A2010) and the current BIOS and currently installed BIOS is 2.0.6, within the BIOS Dell has whitelisted just two MXM graphics cards, there Intel G33 and the ATI 2400 HD. I would like to try and run something like a Nvidia 9600M GT. So following some WLAN whitelisting guides, I've come up with this, Here's the original BIOS download from Dell extracted into this folder (available here http://www.dell.com/support/drivers/us/en/19) Anyway, after extracting it I opened the second of the 1MB files (M-020006) in MMTOOL, I didn't think it mattered which one of the two I opened and used. I did have to append .ROM to the file for it to open in MMTOOL Then I extracted every one of those files displayed in MMTOOLS to a separate folder and opened them all in my hex editor, I searched in every file for the Vendor and Device ID's I had for the Intel and ATI cards, VEN 8086 DEV 29C2 and VEN 1002 DEV 94C9, respectively, and found them both here, Intel ATI Now it is my understanding that I can replace one of these values with the VEN and DEV ID's from say a 9600M GT (10DE and 0649). I would replace the ATI values just in case the card didn't work I wouldn't be left without a display, but are the SUBSYS values important? I don't have them for the ATI card and couldn't find them in the editor for the Intel, no idea what the Nvidia would be. Would that be the process though? Edit those values, save the changes, use MMTOOL to replace the file and then flash the BIOS? Again, does it matter which of the two 1MB files I use? and there's this, Does it mean anything that the selected option shows the same Intel values from the card in the VenderID and DeviceID boxes? I would request the BIOS mod in the request thread but I prefer learning how to do something then make someone else to it for me, otherwise what's the point?