I don't think that will work. There are a couple of other thing that need to be moved, as well as the boot manager. But if it does work - well done. This is the recommended method. Probably quicker to reinstall Windos 7 but:::
Download
VistaBootPro from
Link Removed due to 404 Error
Step I.
Start the Application. It'll redirect you to the BCD backup page. Click on browse to save a backup copy somehwre safe (NOT the windows Vista partition!) Call it something obvious (Backup)
Step II.
Go to the root directory or partition, of the drive where the BCD is installed (Your Vista partition?)
In Windows Explorer make sure you have in Tools->Folder Options-> View -> "show hidden files" &
Uncheck "hide protected files (See picture below)
"
Copy
i. bootmgr
ii. BOOT (folder)
Paste these into the root directory of the drive where Windows 7 is installed.
It will give an error copying 2 file's i.e
BCD and BCD.log, saying they are currently being used by another application. Skip these files
Step III.
Goto the folder where you backed up the BCD earlier( in step I.)
Rename the files like this (make another backup first).
xxx.bcd -> BCD
xxx.bcd.log -> BCD.LOG
xxx.bcd.log1 -> BCD.LOG1
xxx.bcd.log2 -> BCD.LOG2
Copy all these files and paste them into the
C:\Boot folder, replacing all files.
Step IV.
Reboot, and, if needed, go into the Bios and change HDD Priority from
Drive D: to
Drive C:.
Boot up the Windows 7 DVD
Select repair my computer.
You should then be OK