http://www.pconsulting.com.au/textexchange/
it's a free script that allows you to change the same text (or a url) on a large number of pages in like two minutes :-)

http://www.spywareinfo.com/~merijn/cwschronicles.html
this gets out some nasty scumware that adaware, spybot search and destroy and other programs miss. look near the bottom of the page for Epilogue - The Fix