is thr a way tat i cn run my installed OS (vista) from ubuntu 8.10?

Use Virtualbox

Applications -> Add/Remove type vbox into the search and wait a bit, tick the result and click apply.

Then look in Applications -> System Tools for VBoxGtk and have a play.

http://www.virtualbox.org/

Read the manual:

http://www.virtualbox.org/wiki/Downloads

as said before, virtualbox, although im not sure you can run a previously installed OS in your hard drive since virtualbox requires hard disk images(.vmdk .vdi .vhd) but maybe theres a way i dont know about.

With regard to VirtualBox, I think these links might put you on the right track (note: one is written for XP, but it might still be useful):

http://forums.virtualbox.org/viewtopic.php?p=42509

http://forums.virtualbox.org/viewtopic.php?t=9697

k got it