BIPWOP  response from support, Feb 27, 2008:

DasBoot is not Leopard compatible yet. We will have a version soon.  
(Version 1.0.2)

BIPWOP  Hiya!!

Thanks - I didn't know you could put the fingers vertically!

Nonetheless, I still prefer one-finger scrolling. The less I have to do/use, the better for me. Something about the simplicity ... one finger does it all!

There's also this matter of fingernails ..

Anyhoo, it's all under the category of personal prefs - I so like using only one digit, and I like how I can so explicitly configure my trackpad to satisfy my smallest desires!

I did not like having only the few prefs available in the OS, and so relieved when this was made Leo-compatible!!! Whew!

To each his/her own, yes?

Still, thanks for the info - it will be nice to be able to share it if I need to.  
(Version 1.6)

BIPWOP  Amazing piece of software. Don't leave Leopard without it!

Apple's two-fingered scrolling is a real pain (literally) - to scroll vertically when your hand is placed diagonally requires an uncomfortable and awkward hand position.

In addition, Sidetrack allows for so much more configuration than Apple allows. It's just an extension of your hands.

I was a bit wary of using the current version on Leopard, but there has not been a single glitch.

Seriously, I thought about going back to Tiger if this app didn't work with Leopard. My favorite 3rd party app!

Alex's tech support is outstanding.

Worth every penny of its $100 shareware fee. (What?? It's less than that?)  
(Version 1.6b2)