GAG program is for use to create and run dual boot computers.

It is intended to be used prior to a second or more operating system is installed.Since the program hides the MBR to retain the integrity of the operating system it can not be used after the installation of the second operating system.

The windows boot manager creates a single master boot record from the installation of the second operating system to boot either operating system. That is why you keep going back to windows XP it is the controling MBR.

If you want to use GAG you must
1) have only a single or no operating systems installed.
2) install the program
3) create partitions on the drive with GAG or already have the drive formatted or install a different drive.
4)Reboot and GAG will prompt you as to what you need to do to install the next operating system to the partition or drive you choose. The installation is the same as installing a single operating fresh installation in which all drivers and softwares must be reinstalled to the operating systems. This includes all mobo drivers as well! Each operating system is a stand-a-lone installation.