I managed to open the RPF archives of RDR.
The creator's statement of the tool I used is:
.And for anyone wondering why a lot of the filenames are missing for RDR and MC this is due to names being stored as hashes instead of strings as in GTA IV Archives, this means its a lot harder to work out the original filename hence why a lot are just displaying an 8 character hash
But...
How to resolve this?
I need to understand the system. If I do it's no problem for me to fix all filenames.
Thank you guys!
If you need some screenshots, I can hand them over. I can also show you the source code and stuff like that