alright so here's for the second issue.
open gp4 folder, in it find gpxpdata/gfx/digital2010, and open the F1.tga file in photoshop. Open the alpha channel and you should see a F1 logo. Use the background color and go over the logo. Save and exit.
If you don't have photoshop then I think you can also do this in paint.net (free), if you open the picture, use the eraser tool and erase the logo.
If all fails try just removing the file.
Do not forget to backup the original file, as editing it here will also affect all other mods that use the 2010 layout.
GPGSL - Yakuza driver
GPGSL activity check app:
Direct link -
Source code -
Have you posted?