Groups?

[ppc1026]

I'm on 2.02 on an iPhone 3G , newly installed.
Great application, but the set up location menu has mysterious buttons
at the bottom "Add Group" and "Remove Group".
Clicking on them give me a menu called "Add Channel Group" , including
"groups" such as "HD Versions". Clicking on them has absolutely no
effect. What is all of this for and how is it supposed to work?
The website talks about buttons to "Select All" or "Select None" -
these don't exist and would be really useful in setting up locations -
I had to go through 100's of channels by hand to set u

Thanks

[ppc1026]

Never mind. I figured it out. In fact its a good feature for setting
up locations.
Pity it's not explained on the site.