This doesn't seem right:
Ren_001=bbustersj > bbustersja
Ren_002=bbustersja > bbusters

bbusters already exists, so it would mean we would end up with 2 bbusters after renaming bbustersja and also bbustersj would then be renamed to bbustersja making it disappear from the rom set and yet bbustersj is still in -listXML so I believe this is incorrect and it should actually be:
Ren_001=bbustersj > bbustersja
Ren_002=bbustersja > bbustersj

I don't think any current tool will be able to apply such a rename to any files though because this will cause duplicate filenames if you do simple renames (tools would need to use a temp name to avoid filename clashes during the rename process).