One small note of caution on "foreign" (non-us) Domains such as "drp.su": This Domain is the Russian Republic, formerly the Soviet Union (.su), and all Technicians should be EXTREMELY careful about using ALL non-us sourced software. There is always a chance, however small, drivers sourced from websites other than the original equipment vendor could contain "undesirable" (sleeper) code. So Drivers are very critical in terms of safety and U.S. clientele do not need an equivalent of stuxnet lying in wait on any of their systems.
Google searches such as: [laserjet 6500a site:hp.com ] will limit the returned results to only the Domain specified by the "site:" qualifier and this search technique has personally saved me hundreds of times.
(this is my 'Hello' post, I hope it helps!)