i finished downloading the vista beta 2..5384. ..from windows site...i burned a dvd in order to install it... i have a 80 gb HDD with all NTFS partitions as follows : C -20 GB ..for (Windows xp sp3 ) then D (30gb) - formatted for vista... and E 25gb )-all my data after burning ..the dvd ..ichecked if it was working ..and it was perfectly alright....so i booted from the dvd..and started the setup from the dvd..and installed it on D : drive..after the installation was complete..i was suprised to see that during the windows loading screen there was nothing written (like in xp its windows xp professional..(and theres a laoding going on ) it was only plain loading and nothing like windows vista written..then it asked for user name..and all and for the first time i started vista.. then i tried to use ..it but didnt find it easy..as everything was changed.. ** my c partition of xp sp3 ..was being shown as C ..windows vista files..and D had become xp files..!!! **so i restarted in order to start it again ..i could start xp ..but later when again i restarted to start vista to my suprise..it showed..some file error (oox7 sumthin sumthin )corrupt. file.. .and told to re-install some files using automatic recovery ..tool in the dvd.. one more thing ..is my windows xp sp 3 is created using n lite...and is tweaked..so it has a windows folder..and some some system files on a separate folder called" D " ... when ..the recovery tool searched for windows ..it gave some errror ..but then started an attempt recovery..it continued for a very long time ..but nothing happened..so i restarted in betweeen..then i tried to load vista but it didnt..so i tried..xp sp3..and it started scan disk..before logging in..and to my suprise..it replaced a more than 1000 files of xp ..in order to start, while scanning..system files..then my xp sp3...started again normally..and now its working fine...but my vista does not boot giving the same error mesage... what do i do now ???is it due to some conflict between tweaked xp sp3 and vista ?? shud i install first vista and then xp .?? .or shud i install xp on D..and vista on C..?? what do do now for running both of them smoothly...please help me ..i need help urgently.. why isnt anyone replying ???