RewriteEngine On
RewriteRule ^([^/]+)/([^/]+)-([0-9]+)\/$ showthread.php?t=$3 [QSA,L]
RewriteRule ^f([0-9]+)\/$ forumdisplay.php?f=$1 [QSA,L]
RewriteRule ^f([0-9]+)\/([a-z]+)([0-9]+).html$ forumdisplay.php?f=$1&page=$3 [QSA,L]
RewriteRule ^([^/]+)/([^/]+)-([0-9]+)\/post([0-9]+).html$ showpost.php?p=$4&postcount=$4 [QSA,L]
RewriteRule ^([^/]+)/([^/]+)-([0-9]+)\/([a-z]+)([0-9]+).html$ showthread.php?t=$3&page=$5 [QSA,L]
RewriteRule ^([^/]+)/([^/]+)-([0-9]+)\/sendmessage.php?$ sendmessage.php [L]
RewriteRule ^f([0-9]+)\/misc.php$ misc.php [QSA,L]
RewriteRule ^f([0-9]+)\/member.php$ member.php [QSA,L]