New ATI Tray Tools, version 335 is out.

Changelog:
1.0.0.335
+ If you have version less than 1.0.0.333, you must manualy uninstall ATI Tray Tools and restart computer before install this build.
+ Added support for changing resolutions. Click left mouse button on Icon in tray area and select resolution.
Software highlights:

Overclocking with templates
Game profiles with desktop shortcut creation.
Direct3D settings with templates, GUI form and tray popup menu
OpenGL settings with templates, GUI form and tray popup menu
Refresh Lock system with ability to set separate refresh rates for each resolution.
Tweak for overriding Pixel and Vertex Shaders
Speed improvement tweaks for Anisotropic/Trilinear Filtering
Support for system options, VPU Recover, DMA Copy and so on
Support for MMC applications
Support for HYDRAVISION applications
A lot of useful things. Like Save/Restore Desktop icon positions and more
Powerful Plug-Ins support. (API for VC++/Delphi included)

http://www.radeon2.ru/atitray/