If I try to install my 737NGs when I already have the 747 installed?Thanks,Jeff

From the PMDG Ops siteHow do I install the 737NG alongside the 747-400/400F?Due to an installer issue, the 737 should be installed FIRST, prior to installing the 747-400. You will not be able to run the 747 if you install the 737NG after it. Here's the proper install order: 737NG 600/700 Main Installer 737NG 600/700 Service Update 1.3 (if main installer is older than SU1.3) 737NG 800/900 Addon 737NG 800/900 Service Update 1 (if main installer is older than SU1) 737NG 600/700 Model Update (updates the models to 800/900 standards) 747-400 Main Installer 747-400 Service Update 1.1 (if main installer is older than SU1.1) 747-400F CARGO Main Installer 747-400F CARGO Service Update 1.01 (if main installer is older than SU1.01) 747-400 Universal Sound Update (if main installer predates the sound update) Installing the 737NG after the 747-400 (Unsupported workaround)If you absolutely must install the 737NG after the 747-400, try the following: Navigate to your Flight Simulator 9Modules folderRename the file PMDGOptions.dll to PMDGOptions.bakInstall the 737NG and all updatesDelete the PMDGOptions.dll placed there by the 737NG installerRename PMDGOptions.bak back to PMDGOptions.dll

Thanks Jeff, have you tried option # 2 , and if so did it work fine?Thanks,Jeff

Gents-All of this is covered by articles on our wiki based site also. ;-)http://ops.precisionmanuals.com/wiki/Main_Page