Macbook Pro 17 inch mid 2009

I've successfully installed Windows 7 on my Macbook Pro but when I try to download the compatablility software it errors out. 3 Years ago it worked, but doesn't anymore.. I know could try with the cd that came with my Macbook but unfortunately i have misplaced it... Could anyone send me a link? I have searched for weeks now and I can't find it ANYWHERE!! C'mon APPLE!!! I've sold sooo many Mac's for you, plz help me....