DOWNLOAD LINK
I just put together this loading screen addon for SPQR.
I removed the quotes part of the loading screen as they didn't fit my format, but there is a backup file if you want to add them back in. They still work they just don't look right.
To install, extract the data folder to your SPQR installation (default "C:\Program Files\Activision\Rome - Total War" I think).
Also included is a notification to activate the script that shows when you load a campaign, but not going to and from battles during your campaign. It does show if you start a custom battle as romans, but that's not a big deal.
Here is a sample loading screen, and what the menu will look like (only if you have movies disabled with -nm).