Hi, 
I have computer with vista installed in it and i wanna do dual boot between vista and xp home. i followed william's tutorial how i can do but when i m selecting my primary drive for "Shrink partition" its not letting me select any mb or gb coz i alredy been used all the space for that drive. so wizard comes with shrink option disabled. 
Any other option to partition and installed xp into preinstalled vista computer ?  
 
  
 