So in root explorer you click Mount R/W on the opening screen then nav to system/apps and click Mount R/W again, then long press the app to rename and add .old or .bak to the end and hit save or done, it shows that you renamed it in the app list correct. Then while still in system/apps click Mount R/O and hit menu/refresh and it will refresh the app list....if they are still renamed hit menu/home then click Mount R/O then menu exit....once it exits then reboot...
So this is exactly what your doing and its still not renaming or deleting the files? Ive tried to recreate the prob a few times now and I cant get your issue on my phone....
Did exactly what you wrote, but my roof explorer won't allow me to chance R/W or R/O inside the system/apps directory. Only at the root directory am I allowed to change R/O to R/W setting. I even tried changing the file's permission so it can't be written, but once I do that and I go back to the directory, it changes the name back into the original name.