How do I reinstall Vista from the recovery partition on a HP Pavilion DV9000?

I have no any CD for this laptop but I have HP recovery partition there and I need to install Vista back on main partition. I do not see any option to boot from recovery partition Could anyone please let me know how to do it?

Solution 1:

When the HP splash screen appears immediately after you turn on the laptop, press "Esc" to change the boot order. I think there is an option listed in there to boot from the recovery partition.

I have a DV9000, but I think I removed the recovery partition so I'm going by memory.

Solution 2:

You can get a restore cd from here:
Windows Vista Recovery Disc Download

EDIT
Alternatively, you can create a recovery cd from your machine by using the method found here : "RECDISC.EXE how to create a recovery/repair cd". This method required a Vista cd, which you might not have. In the past Vista was available from Microsoft for trial download, and is still available from here.