Please start by loading optimixed defaults in the BIOS, then save/apply/reboot back to the BIOS. Once in the BIOS again set your SATA settings to what mode you want to install windows in, meaning IDE or AHCI. Then install windows.
The 7B error means you've got the wrong mode set for how windows was installed, so you are trying to use a disk with windows already installed on it correct? If so you'll need to set that to the correct value, what it was set to during the install.
If the issue persists, and you are using a clean disk without windows already installed, maybe try burning your install DVD again (If you do this use the slowest burn setting, always do that for OS install media)
Since you originally had hacintosh on the drive, did you do a low level format to the drive, or zero it out? If not you may need to, I'm not sure, but I know sometimes MAC or Linux use funky partitions that windows can't deal with, so just thinking out loud there in case it helps
Also, you will need to flash a normal, NON MAC, BIOS into the board again! I bet that may be part of your issues as well, if you used a special MAC BIOS from somewhere, I know those are out there as well. So if you did that, please update the BIOS to a normal official unedited one, using Qflash or DOS. Then do the above mentioned Optimized Default dance and try the install again once you are done with that.
*Edit*
Haha, I need to stop having tabs open for so long while I reply