|When you boot up and come up to the choice menu that is your boot.ini. It is a hidden file on the root of c:. You can viewit/edit it with a text editor.|
Reason we need to view it is it would have told us in an instant if you had installed both on a single partition or each OS on its own partition and which partition they were installed on.
Glad to see you did not format c: as per your other post. That would have ended badly.