Windows 7 on 2nd hdd

Let me explain my computer to start with. Handmade from bare bones, windows XP SP3. I also have backup images (ghost, acronis, etc..) of the system. Then I installed Windows 7 to a second hard drive and had it set as a dual boot - worked perfectly.
THEN...... I restored an HDD image made prior to installing Windows 7, and now, I do not get the dual boot options at boot up. Boots directly int XP as had in the prior HDD image. I still have Windows 7 on the 2nd HDD. How do I get to it, or set my boot drive to recognize the Windows 7 on the 2nd HDD. Or can I ever again boot off it??