yes, there are some applications wich can be run from windows, but I don't know their names and they don't support all motheboards.
they are greyed out because you have to select "custom" or something like that. look for some setting wich is "auto' or default and set it to custom. Then you can change the grey items.
RivaTuner is great for OC'ing your graphics card and it works with almost every card (ATI & Nvidia)
TheMajorMMX - Intel P200 MMX @ 225Mhz - V-Tech (PcPartner) Baby-AT mb w/ Intel Triton TX chipset - Nvidia Riva TNT2 M64 w/ 16MB - 256MB M-Tec SDRAM - Still running.....