yeah of course.....
you can look at my hack thread, here's the link:
http://www.pokecommunity.com/showthread.php?t=208389
all the tiles are done by me....exept a few like le grass rock tiles^^
go also to the last page of my thread, I posted a screen of the last house I created and inserted ;)
if you want to see more than stuff of my hack just ask me ;)