I had a similar problem with the bootmgr being installed on a different hard drive when the OS was installed on a RAID array. This brought a few other problems with having to go deeper into the wizards to ""load drivers"" then exit out and get back to the command prompt.
Here is what you do.
I tried the same options as listed above. PLUS
The real problem is that the OS is looking for the file Bootmgr but it's not there.
So to get it there you have to copy it from the Windows 7 DVD.
**xcopy d:\bootmgr c:** (where D: is your CDrom) **xcopy d:\bootmgr.efi c:** (don't know if it needs this or not)
Then I ran the above options again. Then it finally booted successfully.