I had some time to make an official how-to of this, since quite a few people have been asking.
P5_mudflaps_install.zip (3mb)
One zip file is in the link, contains a PDF, 2 images, and a text file.
P5_mudflaps_install.zip (3mb)
One zip file is in the link, contains a PDF, 2 images, and a text file.