These games do not stretch full screen, but only vertically, and look quite pixelated too. Do they have any specific problem with the RG350M? Any way to fix this problem? Thank you.
EDIT: The problem was that these games are originally designed for widescreen, so it's not a problem with OpenBOR nor the console.
EDIT2: I have found older versions of these packs which are designed for 4:3. Much better now.