Dual Boot of Vista Ultimate with Xp Home on only one NTFS partition on...

[myaseenl]

...Sony Vaio vgn-fj270b? I own a Sony Vaio VGN-FJ270b laptop with only 1 partition Visible of 75 GB and else is hidden for recovery partition out of my 100Gb HDD running Win Xp Home on NTFS partition.I have made the recovery DVDs myself when i purchased the laptop.( 1.86 Ghz Pentium M Processor,1GB DDR2 RAM,Xbrite Monitor,DVD writer,Cam-Mic-Speakers-MagicGate Card reader buit-in) WAN LAN modem also.I want to do any one the following (need ur assistance):1) Vista Dual Boot with Xp Home? whehter to create a new partion or not? will the Recovery DVD restore my previous Xp Home after using it (if i don't want Vista anymore)?2)To install Vista only deleting Xp Home Edition?(if i dont want Vista will the recovery DVD restore my system again to the original WinXpHome?Kindly provide me the solution.RegardsSUNNYmyaseenl@yahoo.com