Info on your cartridges can be found herehttp://www.stratitec.com/inkrefill/17.html and here
http://www.stratitec.com/inkrefill/16.html
I use universal ink from Stratitec in my HP photosmart 7350 and
my photos turn out great! Althought I have to follow a certain proceedure to reset the ink cartridge to show full. Also,once you go to their web site, you can send them an email and ask them about your ink cartridges showing empty.They are very helpful.
Both color cartridges in my computer would cost about $60. and I refill them myself for about $3. Quite a savings and its easy to do.
Good luck and post back.
Remember HP and most others dont want you to refill and will make it as hard as possible on you to keep you from doing this. Thats why they sell their printers cheap and more than makeup the difference with high priced ink cartridges.