what issue are you having regarding the boot manager
I would like to add to the boot menu other OS's, e.g. my parallel existing Vista.
I found a way to get back to my Vista, but that's a serious detour. When you boot again after the installation the Install disk and enter the 'Repair' function, the Vista partition is found and added to the Boot Menu.
In XP (in Vista I actually dont know), you had the boot.ini file which you could edit. As I still have my Linux partition.
With Grub (the Linux Boot Manager) I have trouble with the installation as well.... but that analysis is not yet finished.