Yes, setting the CHECKINT to 0 will cause it to get the weather every time qbw calls it to update. That's what you explicitly asked for about 8 posts ago, to always update when called.
As for changing the link, it should be beyond obvious where to change that. It's the right at the top of the script, with a comment of "Change this to your URL", and is the only place in the entire script that yahoo is mentioned. Don't forget to put your unit specifier in (it should default to C for most European countries, but never hurts to call it out explicitly).