FSX Add-ons in a networked, multi-pc environment

Hi all,I'm running FSX SP2, with a few add-ons:REX WeatherUltimate Traffic XUltimate TerrainGround Environment XSince these add-ons are generally registered to one PC, what is the accepted (and legal) practice for using them when you have a networked setup with multiple pc's?I'd rather not have to purchase each add-on for each pc (so far 3, next month going to 5). Is it possible to create network shares for let's say, traffic, scenery, and texture and use those, or perhaps even copy the associated scenery, textures, cfg files, etc. to each machine?Maybe even a network instalaltion of fsx...Thanks,MattBTW, I'm a noob for the most part when it comes to what these add-ons do internally to the software. I've got ~3,000 hours flying sims like the PMDG 744, Level D767, and 737PIC, but just started noodling with various environment modifications. If I omitted any piece of pertinent info, or missed some obvious FAQ while searching, please let me know.