reinstall MBR and everything else needed for boot up

Ok, so, this is what happened.

I bought a new 1.5TB drive and installed windows 7 on a partition on it.
I already had a Windows Vista install on my 160GB drive.

The windows 7 installer decided to use the MBR and NTLDR, etc. from the 160GB drive and simply change the boot.ini on the 160GB drive.

Well, this means I have to boot to the 160GB drive, and then choose Windows 7. I wasn't very happy about this, but I lived with it for a few months.

but.. the 160GB drive just died.. So, now I have a windows partition without anyway to boot to it at all. I thought about doing a repair install, but I would rather not. How do I go about restoring everything I need to boot to that partition?

For any of those confused:
Drive A- 1.5TB
Drive B- 160GB

Drive B contained Windows MBR, and everything needed to boot. Boot.ini on Drive B contained windows 7 information. Drive A contained the windows 7 partition.
Drive B poofed, and now I can't boot to windows.

I hope this is clear.

Thanks in advanced.

Run Startup Repair. This article is for Vista, but Win7 is identical:

How to automatically repair Windows Vista using Startup Repair

Sorry, I forgot to mention.

I've tried:
startup repair.
bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcb

none of that helped..

Now, I looked a different thread, which gave me the hint to set my partition as active. I did that using diskpart, and then ran all the bootrec commands for good measure.
now I get BOOTMGR is missing error.
(BOOTMGR is the new NTLDR?)

I am about to run startup repair, and see if it will fix it now.

Yeah, supersparks, you should make note that anyone in this situation needs to set their partition as active, otherwise windows will have no idea how to repair anything.