... OK, your the boss... Well, so am I in a way... I don't know the colour of the PC in Diamond and Pearl, as I have no screenshots. What I do is use Kyledove's tiles, and recolour them when inserted to look D/P-ish.
Sorry, I was just finishing. We did hit a snag. I could only insert the PC otherwise the tileset would have been ruined, and I did my best, so the Mart is a blue Pokemon Centre.