Edit 3d text in 4 files in .ydr format (GTAV video game files)

I have 4 .ydr files from the video game Grand Theft Auto 5 that have 3d lettered text on signs that I want removed and replaced with different wording. They currently spell out 'LifeInvader' and I want them instead to say 'McGill Brothers Industries' with Industries centered and underneath McGill Brothers. There are also other signs with the letter 'L' on them that I would like changed to 'MBI'. Those interested in job should be comfortable with exporting .ydr files to formats they work with and importing back to .ydr. Having the game GTAV to check their work is a plus.