please !! vista 7 theme

can someone be kind and help me? I have a new vista 7 and want to change the thema for apple mac?
how do I do and what pages are secure? how do I do step by step? what software do I need?

urgh win 7 and vista are two separate OSes.

You will need to modify a couple of windows DLL's. It's important to know what OS you have x32, or x64.
Otherwise places to look are deviantart.com and aqua-soft.org. Customise.org also come to mind.
Try to avoid windowblinds. There's just too many issues with it to be honest.

my OS is x32

what is windows dll´s ??