Oh .. kelly's korner, have you only just discovered this ? (rhetorical question he realises ) Here's the main site - Kelly's Korner - which also has links for 98 tweaks & hacks.

Just remember when using this site that often explanations & effects of any particular change aren't fully covered (its done by an individual to be 'helpful' & not some fat megacorp you can sue if the advice is 'pants'), so techz's advice of always remember to backup sounds good to me

(this I think will be more useful in tech tips, so I'll ask for it to be moved )