Hi Guys! Im new here and i ve got a radeon xpress 1250 /x1250. I used this modtool too and it modified the newest 7.10 catalyst driver so i could install it. The hook is, at the moment the modtool doesnt support my graphiques-card so the modified installer recognized my chipset as a radeon x1200! Now ive got the wrong driver on my laptop

but the modtool seems to support this driver you are searching for! Maybe youve downloaded the wrong catalyst driver? Try this one:
Drivers and Utilities : Catalyst™ Drivers
and then modify it with the moddingtool (
http://www.driverheaven.net/modtool/) and install it! It should work!