Hello all, this is probably an old issue, but I can't find the way to change GP4 menu background images. There has to be some old tool to do it, but I couldn't find the way! Thanks in advance.
I don't think you require a tool. I think there are three images, but they are not listed as *.jpg or *.png. Find these three files, copy/paste elsewhere and rename to *.jpg and it should open in a picture viewer. Replace each file with your renamed same size jpg to the original filename and it should display ingame.