if anyone could help me please, i have absolutely nooooooooo idea how to get ventilator's shader script to work...

ive read through several of the posts on it and have done the following thus far:

created a 512 x 512 heightmap
put it in med
created 2 diff 256 x 256 tga's and set them as skins for the terrain
created 1 512 x 512 32 bit tga with alpha mapping and set it as the third skin in med...

when i run the level all i see is the third, alpha map texture that i applied...

at this point i am totally clueless- this is the first time ive ever even touched a shader sooo...

if im doing this completely wrong?? could someone please direct me in the correct procedure...im using the source code given here:

http://www.inode.at/baop/wiki/index.php?TerrainMultitexturing

any and all help will be greatly appreciated!!!