Applications written for 8.0 will only run with the 8.0 rte. New applications written for 8.2 will run only with the 8.2 rte. Your internal support doesn't know what it is talking about if they think otherwise. No need to upgrade the rte unless you paln to rebuild the 8.0 apps with 8.2. Both run times can be installed on the same pc if the old apps are working. Not much reason to change unless they need to be edited and you use 8.2 as the editor. I would image that if you build a new app in 8.2, it would have to undergo the same quality check as the 8.0 applications.
You are able to do a save as for 8.0 so that users with 8.0 can open them and use them with the older version. It's simply not possible for a newer development environment to target a build for an older run-time. Before you even do a build, the source code is compiled for the version you are currently using. The only way to swithc compilers is to switch versions of LabVIEW.
