That's odd. What is inside the sources folder, and please post a screenshot of Disk Management window.
Is there an option to burn recovery discs somewhere in the HP program in the start menu folder?
If necessary , you can get hold of a Vista installation dvd and use your product key. Any proper 32 bit Vista MS install media will do - they all contain the files to install all Editions.
Before doing that , go to HP site and download and save on cd the Vista 32 bit drivers for your model .
Otherwise, I believe HP send out recovery discs free of charge, if you contact your local online support.