I dual boot using EasyBCD for my computer (custom built PC and I checked whether my PC is compatible with installation, it is) anyway I got (windows 7, vista and snow leopard osx for pc) the installation for installing mac on my partition went file, it told me to restart my computer so it could finish the installation, ok when I went to the screen to pick Mac Osx to boot, I get a Grub error screen. What is this? I couldnt get passed this error??

How do I solve this?

Check the BIOS to make sure the CD-ROM drive is listed before the HDD in the boot order.

I did, have the same issue.