@ravenman

no , each different operating system eg. 7/XP use own directory hierarchy , some folders are same and after mixing the systems cause overwrite files and after its not possible to boot to one of them , best solution is creating own logical but primary partition , if you use primary partition for each Windows ,dont remember set desired(which os you want use) partition as active . If logical ,than second os will use bootloader of first os , thats all and sory for my english