Planet Replay

[ceres]

Using DVA to download my 5xxx files and store them on my Mac running 10.4. I want to edit the files then save them back to the "Local_Guide" folder but my Mac won't let me. I get Error Can't create mpeg file. I'm using program MPEG Streamclip v1.9.2.
From what I have read even if I could save the file DVA and replay would not recognize the new file because the file size has changed and does not match the other files created when the DVA downloads the files from Replay (.evt, .ndx, xml)
Reading post here appears that "rtvconvert" would work but I have little experience in command line authoring.
There was a GUI program "Replay Toolshell" for MAC but I have not been able to locate.
Does anyone know of another way to edit the replay video recreate the necessary .ndx, .evt and .xml files and store back into DVA to view on the Replay using MAC software PPC?