I use Space Designer in Logic Studio with custom IR files with no problems - it works exactly as expected. I recently was mastering a complete CD in WaveBurner (1.6.0) and wanted to add a little SpaceDesigner reverb to a track. When I try to load an IR, I can't get the normal Mac directory window. Space Designer works on the files, but only has the synthesized IR available. When I click on the "Load IR" button a pop-up window appears, I select "Load IR" (or any choice) and nothing happens (no directory path window). I can change the synthesized IR sample duration. As I said, in Logic 9 it works fine. All the Apple supplied, and all of my custom IR's are able to be selected from the directory window. Otherwise WaveBurner works perfectly as does Space Designer in Logic 9. Is it possible to load IR's in Space Designer when it's being used as a plug-in in WaveBurner, and if so, how? Thanks.