Is this still being looked into? It has been literally years since this problem has surfaced dating back to Cubase 4. I too have resorted to the UVI Workstation workaround which is great, however, I noticed a problem between using it and Halion 4 earlier this week. Previewing a loop in UVI Workstation, then dragging and dropping said loop straight into Halion 4 works no problem, however, the sample can never be found upon starting up of the project again. Halion 4 cannot find it as it came from UVI Workstation and not Mediabay/Windows Explorer.
The point I am trying to make is these workaround have limitations as well and one would not have to rely on 3rd party software to preview their RX2 in time with the project LIKE CUBASE STATES IT DOES if Mediabay just did this properly from the beginning. It isn’t like RX2 files are new or anything, they have only been out for 12 years now. 