Ok guys, it may not be ideal but I got a transparent slider working. I've posted over in another thread:
I'm not allowed to post links yet but it's thread 1477103.
Basically it's using Chuckz07's Transparent Mode9 fix and one file from his 6.1 manila files. I haven't cab'ed up everything because it isn't my work. I'll PM Chuck later if he doesn't respond on the thread at some point but I posted the files you need on the other thread and here as well.
In short, install the Mode9 fix and then extract 1e29e8e7_manila from the attached cab (or just get the manila file that I've already extracted for you lazy people
)and copy it to your \Windows directory (do NOT install the cab, your icons will get all funky). Either reboot or stop and restart TouchFlo.
HTH