Will this dual boot scheme work?

[Jim Byrnes]

When I bought this machine it came with Windows 7.  At that time my only 
need for windows was to run TurboTax and I could do that using XP in 
VBox so I had no real need for Windows 7.  I unplugged the HD that came 
with the computer and put in a new HD and installed Ubuntu 10.04.  When 
10.04 was no longer supported I pulled the Win 7 HD added a new HD and 
installed 12.04 and dual booted with 10.04.  With XP coming to end of 
life it looks like TurboTax will no longer support XP so I want to dual 
boot Win 7 and 12.04.

My bios will let me choose which HD to boot from.  Right now it brings 
up grub from the HD containing 10.04 and then boots 12.04.  I would like 
to pull the HD with 10.04 on it and replace it with the HD containing 
Win 7. Then tell the bios to boot from the 12.04 HD.

If I do this will grub on the 12.04 HD boot and find Win 7 as a bootable 
OS and add it to the grub menu automatically so I can dual boot 12.04 
and Win 7?

Thanks,  Jim