I’ve got that situation.
I needed print from my new laptop with windows 7.
I could not because HP doesn’t have that driver.

I did :
1) I downloaded driver for windows Vista.
2) Unzip. (When you try to install, driver is unarchived on disc C:\hp )
3) Copy all folder when you will see message about “We don’t have driver for windows 7″ (before click “OK”)
4) Control panel -> Hardwar -> add device
5) install driver from a folder. (We copied the folder after unarchived)
6) use the printer

I think if you will not find driver for windows 7 for any devices, you can try that method.