Ok, here's what I got out of it.

I downloaded the converter, converted the dds (dxt5) files to bmps (dxt1) then converted back to dds (dxt1)

My trees came out with the triangles - this I found out is because you lost the alpha channel on certain ones during conversion. I went back to the original dds files and put the offending files back in among the other converted files.

Basically if your going to try the converter tweak - dont convert the dds files that begin with 'veg'  or 'tree' or you'll wind up with triangles.

I'm sure there's a way to keep the alpha chanels even converting all the dds files, but I don't know how. This is just my way around the prob.

Keni