You can use the old Profiler to playback a trace. That will act as a measurable set of tests and will put some load on the system. You just can't scale that load up the way you can with Distributed Replay.

Loath though I may be to suggest other vendors, but Quest used to have a load testing software that I used to use to test out apps. I'm not sure they're still selling it or not. You could check there.