adam ryder :
well i have gta san andreas and i have modded it with a graphics pack and dousnt work properly on windows 7 i also have scarface the world is yours which only works on windows xp. How could I get those games to work without installing windows xp. Would a windows xp emulator make the games work
Have you considered right clicking the EXE file that is the game (I have GTA:SA too) and using compatibility mode? It will attempt to run the game as that version of Windows you select. Sometimes it takes a bit of finagling and messing with (i.e. says it works on XP, but really it means XP SP1 not the XP SP3 mode).
Normally for Dual Booting systems (as noted it is HIGH risk and often leads to one or both OSes getting hosed up in the Boot Sector), so often they use third party programs (BCDedit comes to mind) as the 'boot' loader to then choose which OS to use from a menu. I would recommend though the suggest VirtualBox (OS as a Virtual PC) as the better solution, as it works real well even for games most often, if you MUST use XP.