Is User Group Policy useful?

Hi,

Is there possible to deploy AD group policy to an organisation that more than 100 user using win98, win ME, win xp home and pro.

I try before to test on certain group but it doesnt work. Eg. I set all their individual machine browser to company home page. But when i open the browser and it still showing the homepage that the individual setting on their own machine.

Whats in my mind is to set limitation on their ind. machine from server AD group policy for example run application right after they login and desktop setting.

Regards