If you get to the point of having to reinstall then it should be to wipe the HD first which wipes everything out, so you'd need to back up your files and unplug all HD's to do that. '
But first I would try unplugging all other HD's again to run 3 separate Startup Repairs again with reboots in between - just to be sure it was done correctly.
If that fails, use Partition Wizard bootable CD to resize Win7 from the left by about 200mb to create a System REserved partition to boot it.
To do this with all other HD's unplugged boot into PW CD, rightclick on C to Resize, drag left border to right 200mb, click OK.
Then rightclick the 200mb space to Create New partition NTFS Primary, labeled System Reserved and given a letter, click OK.
Now rightclick the new partition to Modify>Set to Active, OK.
Then click on the HD # to highlight it, from Disk tab select Rebuild MBR, OK, Apply all steps.
Reboot to see if Win7 starts. If not boot into Win7 DVD or REpair CD to run 3 separate Startup Repairs to write the System boot files to the Active partition until it boots it.
If this fails then you can wipe the HD to reinstall.