AMD Dual 4200m/5650m

[inouext]

Hi.

I have a HP notebook with 4200m / 5650m.

4250 – PCI\VEN_1002&DEV_9712&SUBSYS_1440103C&REV_00
5650 – PCI\VEN_1002&DEV_68C1&SUBSYS_1440103C&REV_00

Tried several drivers and nothing worked, including the latest "amd_catalyst_win8_release_preview"
Im using Windows 8 Release preview 8400
Consumer Preview worked great with Amd CP drivers

Anyone can help me ?

Thanks.