VB4 .htaccess redirect old url to new url

[decentplayboy]

Hi, i just changed my forum domain. I want to redirect all my existing google search result from old url to my new url

for example

i want to redirect the exact link as below

http://oldurl.com --> http://newurl.com

http://oldurl.com/forum --> http://newurl.com/forum

http://oldurl.com/forum/forumdisplay.php?f=275 --> http://newurl.com/forum/forumdisplay.php?f=275 (f=275 is for example)

http://oldurl.com/forum/showthread.php?t=7462 --> http://newurl.com/forum/showthread.php?t=7462 (t=7462 is for example)

http://oldurl.com/forum/showthread.p...l=1#post972978 --> http://newurl.com/forum/showthread.p...l=1#post972978

what is the .htaccess rewrite rule that serve this purpose? which .htaccess should i modify? public_html or /forum

your help is much appreciated. thanks