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#11
Well according to that screen shot all you need to hide is the W7 boot drive G: as it does not show the 100 Mb system boot partition which is strange because whenever I have installed W7 it has always created a 100 Mb boot drive and the Main C: drive.
From that screen shot I see you have Two hard drives, one with 3 partitions with the XP and W7 OS on and another hard drive with 2 Partitions on.
If you have followed the tutorial correctly and hidden Drive G: then XP should not see W7.
Any thing further than that I am at a loss to explain and will need someone with more knowledge than me.
Sorry that I can't be of more use.