He cloned the RAID array onto a single drive, so now the full contents are present on a single drive.
Does you motherboard have a secondary storage controller (usually different colored SATA slots)? If so, try setting that controller to non-RAID and attaching a hard drive or DVD drive to it and booting to your main Windows 7 partition. Then, after it installs the drivers for the non-RAID controller, restart the computer and set that storage controller to where you had it, and change the main controller to AHCI or IDE mode (preferably AHCI) and try booting again.
with the RAID online go to disk management and you will see that the RAID array has 2 partitions. The hidden partition is part of Windows 7. You must make 1 partition 100 MB partition first and then create a second partition with the rest.
Give the partition on the RAID that says (SYSTEM RESERVED) a drive letter and then go into folder and search options and choose the view tab and uncheck the "Hide protected operating system files" and transfer all the files on to the 100 MB partition on the single drive, Then remove the drive letter from the 100 MB partition and then try to reboot.
The 100 MB drive has the bootmgr file and Boot dir.