How to mod Catalyst(10.7 or newer) for Mobility Radeon HD 5xxx for WinXP This solution is mainly written for ATI Mobility Radeon HD 5xxx series gpus under Windows XP, until Mobility Modder updates. I own an ATI Mobility Radeon HD 5470 and it fully works . 1) Download Catalyst 10.6 alpha drivers from: http://strags.com/d/ATI-8.740.0.0000-XP-2003-Vista-2008-7-x86-AMD64.rar: they are taken from the Dell ftp site; 2) download the ORIGINAL Catalyst 10.7 DESKTOP version drivers for Windows XP from the AMD site (10-7_xp32_dd.exe), and, remember, download every single package and not the all-in-one package; 3) extract 10.6 alpha in a folder and search for "CX_98262.inf": copy it to the desktop, rename it "CX102491.inf"; 4) (thanks to evec for this solution!) now open it with the Notepad and edit [Version] last line to: CatalogFile=CX102491.CAT Search "SourceDisksNames" and change all "B_98259" to "B102427"; 5) extract the ORIGINAL Catalyst 10.7 drivers by doubleclikking on "10-7_xp32_dd.exe" and stopping installation. Now they are in C:\ATI ; 6) download Microsoft Orca (Orca.msi) and install it; google it if u don't have; now an already modified "CX102491.msi" file is allegated, see bottom of the page: skip passage 6-7-8-9-10-11 using it, if u wish to; 7) copy "CX102491.msi" from "C:\ATI\Support\10-7_xp32_dd\Packages\Drivers\Display\XP_INF" to your desktop; 8) open 10.6 alpha folder and search for "CX_98262.msi", copy it to the desktop; 9) open "CX_98262.msi" with orca, and export "ATI_ASIC_Include" to the desktop: now u have "ATI_ASIC_Include.idt" file on it; 10)open original "CX102491.msi" from "C:\ATI\Support\10-7_xp32_dd\Packages\Drivers\Display\XP_INF" with orca; 11)import table ""ATI_ASIC_Include.idt" from your desktop into the opened original "CX102491.msi" and remember to SAVE IT before close; 12)copy modified "CX102491.inf" from the desktop to "C:\ATI\Support\10-7_xp32_dd\Packages\Drivers\Display\XP_INF" and overwrite the original one; 12a)OPTIONAL STEP: you can modify some values inside "CX102491.inf" to reflect the correct driver version and number, just manually do it if u wish, graphical purposes only, pm me if u wish to know how or download the allegated inf file (rename it CX102491.inf); 13)manually install driver using modified CX102491.inf (now in: "C:\ATI\Support\10-7_xp32_dd\Packages\Drivers\Display\XP_INF\CX102491.inf"), do not use the installation setup, and remember that this driver is unsigned, of course. Install all other packages regularly. P.S.:Remeber that "CX102491.inf", "CX102491.msi" and "B102427" reflects current names in Catalyst 10.7 DESKTOP drivers, change those names, for this method to work, if u have a newer or different Catalyst desktop driver release. For those in trouble with orca, modified "CX102491.msi" is allegated, rename it and copy/overwrite it in "C:\ATI\Support\10-7_xp32_dd\Packages\Drivers\Display\XP_INF\".