To Johnboy,
Win 7 bootloader is something entirely different !
Once you install win7 along with winxp or Vista, it takes over the booting.
You just can't format win7 partition and get xp to boot, it becomes unbootable. You have to repair the MBR to remove win7 bootloader and recover xp bootloader. (Winxp and win7 bootloaders are different)
That is as I presumed it to be ....... normal; but I have no direct experience of Win 7 so was not certain.
I wonder, in case PCLOS overwrites the MBR, what happens to the dual-boot option ?
Won't it still have two options: win7 and win Vista ?
Not if it is installed in place of Win 7 thus eliminating the Win 7 boot manager files on Win 7, and also installs Grub from PCLOS as the new boot manager.
PCLOS will overwrite the MBR unless told not to.
It will provide a dual boot option in this case ..... PCLOS and Vista.
regards.