Well, I assume you can now boot normally into Win 7.
You have downloaded EasyBCD version 2?
If you look at the View settings button, it will show the bcd store, or the boot menu basically. You should have an entry for Windows 7.
You need to add an entry for XP, which you do by the add/remove entries button. Select the Windows tab then NT/2k/XP/2k3 from the dropdown list. Then Add Entry. If it asks to add files, let it do that. This adds three files into the boot area and modifies the boot.ini to see the XP install.
Now the View Settings window should have an entry for ntldr or possibly a number.
You should be done. If it still doesn't work, post back attachments of the snipping tool picture of the disk management window, the boot.ini file and a copy of an administrative command prompt window after typing bcdedit. This can all be done with one attachment if you work it right