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#41
I just told you EasyBCD should prompt to install the XP boot files when you add XP from Win7. If it didn't then there was something else wrong.
The Active flag tells the System which partition is to boot, or the repair function where you want the boot files to be repaired or written. It will not write or repair the boot files to a non-Active partition without marking it Active first. Merely marking it Active will not boot it if the boot files have not been written there yet.