Download this, extract to your game folder and run nGlide210_setup.exe
pastebin.com/U0Mh2ZKi
I don't remember exactly where I got those dlls from but those are what you need for Reshade to work in Glide games, I use it for Metal Fatigue.
As for Porsche Unleashed, I know a way of enabling music and videos through a regedit tweak and manually copying files from the disk image. I also know of some unnoficial fixes and stuff but I still don't know how to reliably enable antialiasing and true non-stretched widescreen support. If you want some help I could do it.