Dual Boot Win 7/XP

Hello,
I had win 7 installed first, and then installed xp in another partition on my disk. I reformatted the partition because it had other things on it. When XP finished installing, and I restarted the computer, XP just loaded without giving me a prompt if I wanted to load Win 7 or XP. Then I did a couple of startup repairs using the Win 7 disc. After that, Win 7 loaded without giving me an OS prompt. When I go to Startup and Recovering in System Properties, XP isn't showing on the OS list.
What can I do to fix this?

Thanks for responding but I already solved the problem by following the steps on this webpage.
Windows no longer starts after you install an earlier version of the Windows operating system in a dual-boot configuration

Well actually, it didn't work.
After going through the steps on that website, I loaded Windows 7 first. I saw both Win 7 and XP in the system boot. After that, I tried to load XP and it showed me this:

Code:

 
Windows failed to start. A recent hardware or software change might be the cause.
 
Here is where it tells me how to repair the computer.
 
File: \ntldr
Status: 0xc000000F
Info: Application missing or corrupt.

After that I tried going through the steps again using the command prompt on Win 7. It still didn't work.
Then I used the Win 7 disk and used the command prompt on that. When I try to load XP it still gives me that error message.

Yeah, im on it now.

EDIT: I added a picture. I don't see why I would need to add an entry.