Hey I know this post is old, but I lost the old version a while ago along with a hard drive
but have been getting into this stuff again.
Anyway, I came across the same issue
As said previously in the thread, they are based on bazz's tutorials, and use wla-65816 for compiling.
All it really does is add a tile map that takes up the full screen, that is just 1, 2, 3, 4...etc. rather than a "real" tile map.
Nothing special, but there are a few tricky points with not overwriting the tilemap, actually converting the graphic that may frustrate some people.
It should be relatively well commented, but isn't super optimized yet. (I made an .inc that has some of the registers labeled, but didn't go all the way with it yet, and didn't use the macro that bazz made to load the tilemap it is still just a routine)
There is a 4bpp and 8bpp version and it does scrolling as well.
I put it on my google drive here:https://drive.google.com/file/d/0B4wfhZPgSasGYUw0bl9qSFdENTQ/edit?usp=sharing
and here it is working on a real system (famiclone, but I am pretty sure it will probably work fine on a real SNES as well): http://instagram.com/p/jVBH3JP9ZQ/