Such drivers, if they are made are from http://www.hp.com
Driver development is far more expensive than replacing your printer... Or you may find it cheaper to obtain Windows 98?
When wanting to print in ME I'm used to from Win98 that I have a "custom" paper size to use (and I need it). But now in ME I don't have that option. Is there a way to add it or get a driver to support this on my DJ850C?