Your thread title seems to challenge (test) everyone's knowledge about your problem, and you are asking for suggestions.
So, i hope you don't mind if i turn that around and challenge you.
Did you read forum rules?
See rule #2 about thread bumping and multiple posts for the same issue.
Your duplicate post - http://www.sevenforums.com/installat...n-booting.html
I also suggest you read the forum FAQ - Windows 7 Forums - FAQ
Did you use Google advanced search to refine your searches? Google Advanced Search
Did you look through SF Tutorials for help and documented instructions for your issue? Tutorials - Windows 7 Forums Windows 7 - Tutorial Index
Do you know this is a Windows 7 forum?
Your issue is with Windows 8 and Windows XP.
There is a Windows 8 forum - Windows 8 Forums
A few quick advanced searches and I found this. See if it helps answer how to solve your issue. Dual Boot Installation with Windows 7 and XP
hope this helps,