>A loader? As to my knowledge a loader can be a very small exe and the actual code will/can be in a huge app-file. Suppose the small loader is on the local machine and the huge app-file is on the network, would that give more speed? I seriously doubt that.
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>The advantage of not having the exe on a local machine is that an update is simpler. Yes I know that a batchfile could take care of updating, but it's not in my hands here.

No, I meant a small exe which would copy the big exe (or .app, doesn't matter) from the server if newer than local (or local is missing), then would run the local. Each user pulls each version of the exe exactly once from the server. May take a hit when new version is up, but that's actually staggered (unless they all log in at the same time).