[tutorial] for mod_rewrite and help wanted

[MrNase]

Hey guys :)

Can someone give me the link to a good mod_rewrite tutorial?

I need to redirect
http://www.mydomain.com/help.php to http://www.mydomain.com/help/ and redirect

http://www.mydomain.com/test.php to http://www.mydomain.com/test.html and

http://www.mydomain.com/test/index.php to http://www.mydomain.com/index


i don't have a clue what i shall write to the .htaccess -file :(

//edit: its an apache 2 server :)