I have several computers with the full version of Labview (8.0.1 and\or 8.2) as well as the most recent version of the Vision Development Module (VDM 8.2.1), all fully registered and activated. In addition, I have one computer we have designated the "build" computer which has the professional version of LV 8.2 as well as LV 8.0.1 Full version w/ Application Builder (we have delayed migrating certain applications to 8.2 for various reasons). Instead of distributing applications as source distributions to these computers (uncompiled VIs), we would like to use our build computer to compile applications that make use of the Vision image processing VIs. I know that all of these computers have the appropriate LV run time engines installed, but I was wondering if I need to install (and thus purchase) the Vision Run Time Engine for each of these computers. I know that when you install VDM, you also get a copy of the vision RTE (in C:\Program Files\National Instruments\Vision\Run-Time Engine). Does this mean the engine is already installed and ready to run compiled applications? Or do we need to pay for the engine on each computer?