I've never used Trivia Bot By Tigger so I'm unfamiliar with its capabilities, but customizing an installation of mIRC specifically for a trivia bot seems silly. Have you checked out Tat's Trivia bot? You install a single .mrc file instead of a monstrocity of scripts and inis that override mirc's files.
I believe it also has the ability to set the number and percentage of hints and can randomize which characters are revealed.
http://tatarize.nfshost.com/
