KMail question

I have kmail from kde 3.1.3-woody (from kde.org) and I'd like to know if it is possible to disable the "open the last message automaticly when I change folder" option? Nic Cola -- Real Users are afraid they'll break the machine -- but they're never afraid to break your face. -- To UN

KMail question: launching URLs with Mozilla, not Konq

Is it possible to have KMail use Mozilla to launch URLs instead of Konqueror? This seems like a fairly simple thing to do, but I can't find out just how. (If it matters, I run woody, and use WindowMaker day-to-day with some KDE apps.) Thanks, Gordon