Removing one hard disk breaks Vista booting!

#1
Hey guys... this SHOULD be easy...

My C: drive is a SATA drive with Vista on it

My D: drive is a SATA drive with data (no OS) on it, BUT it has the Vista boot mgr

My goal is to remove the D: drive for safekeeping.

So I set C: to active and I removed the D: drive and rebooted. Can't boot complaining about winload.exe. So I attempt a repair with Vista DVD a couple times, that doesn't work either.

How do I remove a hard drive with nothing but data on it without breaking my booting? I want to do this without downloading or buying any other applications.