LJConfig

LJConfig 1.2 allows you to easily modify the settings of supported Hewlett-Packard LaserJet printers from you desktop across any sort of printer connection.

It allows you to change the Density, Tray Locking, Fuser Temperature, EconoMode, REt, and Resolution settings. Version 1.2 adds support for setting the lines per page and control panel text, fixes an issue with the setup program when installing to drives other than C:, and includes an updated help file.
LJConfig is freeware. This program requires the Visual Basic 6.0 runtimes (MSVBVM60.DLL) and the Microsoft Windows Installer (Preinstalled with Windows 2000, Me, and XP, instructions at http://www.victechsoftware.com/ljconfig.htm) to install.