guys i love it,i love it.i successfully can boot windows xp from one drive and boot vista from another drive.
So at start up i have 2 choices,although vista business does have this feature at the os choosing,It is a bit sluggish so went searching the net for a long time till i came up with a tweak,this is not a tweak per say,but it will encourae many members here on this forum to install vista.It works perfect for me.
ok first you must have 2 hard drives
first hdd install vista,if everything works register it,but if you on xp upgrade to vista
tell vista to keep you xp windows on the drive as windows old..ok done
after everything is installed,look in computer on the vista system and put alll your data from the windows old that you have in the relevant places ok
next delete the windows old folder ok
now switch of pc and put other drive in as a slave on the ide 1 cable,now the set up is id1 vista drive master and clean drive slave on the ide slot
boot up ,let cd be firstboot(bios controlled)
have the xp cd in and say install on the clean drive(select the clean drive to install xp(make sure to format via xp the clean drive)
After xp installed check everything ok now reboot.
then you will see xp will boot all the time and there is no vista,dont worry just unplug the xp drive now and reboot,but put the vista cd in and say boot from cd.
Now vista cd will load,,follow instruction and you will see to repair vista,click repair vista windows,this will take 1 minute and vista will reboot,Now after reboot vista will work again.
switch off pc and insert the xp drive again.
Now reboot and vista will now have that menu that says early windows or vista,just enter the os choice and test xp boot properly,If it does then you in luck
reboot again and select vista and if this boot ok then you also in luck,cause now you have a genuine dual boot os system.
this is what i did exactly and if you do this you will have a dual boot xp and vista,that works 100%,unlike other sites and wiki,they dont work,It took me 4 hours to find this out and make work ,SO please no partitioning drives,it will just cause headaches.
thanks to antwan for giving insight into doing this...i love you man