LJConfig allows you to easily modify the settings of supported HP LaserJet printers from your desktop across any sort of printer connection. It allows you to change the Lines Per Page, Control Panel Display, Density, Tray Locking, Fuser Temperature, EconoMode, REt, and Resolution settings.

LJConfig supports the following LaserJet printers:
Some LaserJet 4s (4 Plus, 4Si, and some others)
LaserJet 5P, 5MP, 5L-FS, 5L Xtra
LaserJet 6P, 6MP, 6L, 6L Xtra
LaserJet 1100
LaserJet 1200/1220
LaserJet 2100/2200
LaserJet 3200
LaserJet 4000/4050/4100
LaserJet 5000
LaserJet 8000/8100/8150