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#2220
I have installed XP and 7 ultimate 64bit both on the same drive without problem.
Install XP FIRST formatting the drive to whatever size you want to use. ie 500gb drive make it 250 gb to install XP To.
Install XP get it up and running , updated and all you want to put on it, defrag it and check it is OK.
Then install W7 in the unformatted part by by formatting and making the unused space a primary partition. then install Easy BcD and that should allow access to XP and it should work without any problem.
Do the registry edit in XP to hide the W7 system from XP so that you don't keep losing the W7 system restore.
Files from 7 you can place into XP directly but files in W7 you can't see from XP.
I started with a clean drive that had been written to with 1's and 0's and so was totally clean.
If you are installing to separate drives you can install each OS to its own drive and use the machines bios to choose which to boot into. best to install XP to one drive then remove the drive then put in the other drive and install W7, OR you can install Easy BCD.
You will still need to do the registry trick to stop XP seeing W7 as it will still delete W7 system restore files.
Why you have so many partitions beats me and without further details I can't be more specific.