UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support Portals, Custom Islands, Polls - How To

Guys, I am still pretty confused about:

1] The difference between Portals and Custom Islands;
2] When to use which.

SPECIFICALLY, my immediate concern is I want to set up a Poll of the Week, at the top of the right column, and want to know:

1] Which feature to use?
2] How to set it up.

Thanks all.

Rick Bin