OEMs have a habit of not letting AMD/ATI release updated drivers specifically for the mobility chipsets, which is particularly unfortunate when you want to be cutting edge with the latest operating system releases. On a good note, the
Mobility Modder has been updated to support the Radeon Catalyst 9.2 and 9.3 releases
here.
There is also an
ongoing discussion on the forums related to Windows 7 support for Catalyst 9.3 of the Mobility Modder. From what I gather so far, is that the tool patches the .MSIs correctly but adds the .INF entries for the previously unsupported chipsets improperly.
Assuming you extracted the ATI drivers to the default location (%HOMEDRIVE%\ATI\SUPPORT\*):
For W7 x64: Run Mobility Modder (the beta mentioned above, not the one from the Download page) on the uncompressed drivers. Search for
[ATI.Mfg.NTamd64.6.0] inside
%HOMEDRIVE%\SUPPORT\[ATI version]\Driver\Packages\Drivers\Display\LH6A_INF\C7_77072.inf and
%HOMEDRIVE%\SUPPORT\[ATI version]\Driver\Packages\Drivers\Display\LH6A_INF\CH_76829.inf, and change all instances to
[ATI.Mfg.NTamd64.6.1].
For W7 x86: Run Mobility Modder (the beta mentioned above, not the one from the Download page) on the uncompressed drivers. Search for
[ATI.Mfg.NTx86.6.0] inside
%HOMEDRIVE%\SUPPORT\[ATI version]\Driver\Packages\Drivers\Display\LH_INF\CL_76828.inf and
%HOMEDRIVE%\SUPPORT\[ATI version]\Driver\Packages\Drivers\Display\LH_INF\CW_77071.inf, and change all instances to
[ATI.Mfg.NTx86.6.1].
If you are confused by the .INF editing, I've saved my
x64 .inf and
x86 .inf files. Extract them into the directories mentioned above and allow the originals to be overwritten.
Rerun the ATI setup program and it should offer to upgrade your graphics driver as long as it is one of the supported chipsets. If that doesn't work, you can always try to manually upgrade the driver from inside Device Manager and manually browse to the directory where the .INF files are stored.
Keep in mind - all of this is completely "unsupported" by ATI/AMD and myself, so if you break something, you get to hold both pieces.