Interesting to see your take on completing the hack, however, just to note all of the gym leader and elite four teams were already present in the game's 2010 patch. It was fun planning those out. Also the overworld sprite used for the Andre was supposed to be for Blake, a Dark-type gym leader that I planned for the 8th gym.
Here's some spritework I made of the gym leaders years ago,
Re-imagining of Morphic Tunnel also mapped out years ago,
Route 807 (full map),
"Gneiss Town",
Victory Road (exterior) as seen in YouTube video,
This project has always been in the back of my mind. I definitely would like to complete it one day and add in ideas and characters developed in hacksrepairman's version. I thought that the Latios and Latias areas were particularly interesting. There are many more parts of the region that I've mapped out from years back and ideas that haven't seen the light of day yet.
Yes, I originally wanted to add some 5th gen tracks into the game as it does give the game a different feel. Unfortunately, I've lost the original midi and sappy files for the tracks that are seen in my YouTube channel! I had to edit the ROM to allow for more voice tracks to be played simultaneously. A track sounding like the ones on my channel would play differently on a vanilla Fire Red ROM.