Will you be using it inside 1 members area or a bunch of them?
If you are going to use it in a bunch, whichever script you end up choosing, install it outside of your main /html/ folder and get it setup as a global alias.
That way, you can use 1 installation across all members areas, it really saves a lot of time plus, makes the polls look a lot more active inside each site then they actually are
Regards,
Lee