I can upload that scm for ya, one second... (will edit)..
For those having troubles with trainers and such, try (i) downloading the updated launcher that Buzz posted at the start, or (ii) try running the game without the launcher, hence using the gta_sa.exe thats in your SALC folder. If that doesnt work.. well i cant remember anything else.... (i had that problem too, but i fixed it, i think by doing one of those two methods above)
EDIT: Done, see attachment, this is made to work with SALC version 3, it enables taxi boost for taxi/cabbies. Enjoy! Buzz, feel free to add this to your post at the start if ya want.