You lost your disk to use your printer what can you do?
Generally, you can google to find a manufacturer's website and often you can download the drivers that you need to use the printer. Things often get complicated if you are trying to use it in Vista when it is only available for XP. Simply, because the printer manufacturers want you to buy a new printer.
If you cannot locate any where that you can find the software you need, do not despair, most printers are cheaper than the ink cartridges that they use. It is sad, but now-a-days you can buy a brand new printer with the ink cartridges for only a little more than what it costs for the ink cartridges alone.