Bootcamp Win 7 Drivers for iMac Core Duo 2.0 20"

Greetings everyone. I'm dealing with an iMac Core Duo, 2'" 2.0GHz, Early 2006, code A1174 (iMac 4,1).

I installed the most recent OSX allowed for this machine, that is Snow Leopard, and updated it.

I then used the Bootcamp installer in order to partition the hard drive (successfully) and install Windows 7 (successfully).

However, no drivers were installed. Forums say I just need to slide the DVD in and the installer will do the rest automatically. Now I don't have the original DVD anymore, tried to download from the Apple site every 4.xxxxx set of drivers but none works. Is there a way of retrieving those drivers or is the original SL DVD the only solution?

Thanks and cheers.