Installing Hackintosh (SL - MBP version) on a system that already has Linux and Win7

[milomak]

I have an Asus P6T Deluxe V2, i7 920 and an nVidia GTX295 card. So I will be using the boot-123 from this thread.

 

I currently have a Macbook Pro (currently only running Debian) and it came with Snow Leopard (v10.6 Disc version 1.0). Does it matter that SL came with the MBP?

 

Secondly, I have 3 SATA HDDs on this computer. Should I unplug the 2 on which I won't be installing SL to?

 

Thirdly, one of the hard drives (the one I want to install SL to) is the one where i have Win7 and a number of Linux distros. I am currently using Grub2 to boot into Windows and the Linux distros. Will installing Hackintosh overwrite my grub which is on the MBR? If it does overwrite grub, if I reinstall grub to the MBR, can I just add an entry to Grub boot the SL install?

 

Thank you.

 

edit - i did try to see whether the install process would run using the MBP SL and the install process came stuck at this point - http://img16.imageshack.us/f/img20110115174233.jpg/

 

I still had all my drives connected if that makes a difference