***Blaze***, Вот так у себя сделал.
Код: Выделить всё
# DO NOT GO FURTHER IF THE REQUESTED FILE / DIR DOES EXISTS
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
#####################################################
# PHPBB SEO REWRITE RULES ALL MODES
#####################################################
# AUTHOR : dcz www.phpbb-seo.com
# STARTED : 01/2006
#################################
# FORUMS PAGES
###############
# FORUM INDEX
RewriteRule ^forum\.html$ /index.php [QSA,L,R=301]
# FORUM ALL MODES
RewriteRule ^(forum|[a-z0-9_-]*-f)([0-9]+)(-([0-9]+))?\.html$ /viewforum.php?f=$2&start=$4 [QSA,L,R=301]
# TOPIC WITH VIRTUAL FOLDER ALL MODES
RewriteRule ^(forum|[a-z0-9_-]*-f)([0-9]+)/(topic|[a-z0-9_-]*-t)([0-9]+)(-([0-9]+))?\.html$ /viewtopic.php?t=$4&start=$6 [QSA,L,R=301]
# TOPIC WITHOUT FORUM ID & DELIM ALL MODES
RewriteRule ^([a-z0-9_-]*)/?(topic|[a-z0-9_-]*-t)([0-9]+)(-([0-9]+))?\.html$ /viewtopic.php?t=$3&start=$5 [QSA,L,R=301]
# PROFILES THROUGH USERNAME
RewriteRule ^member/([^/]+)/?$ /memberlist.php?mode=viewprofile&un=$1 [QSA,L,R=301]
# USER MESSAGES THROUGH USERNAME
RewriteRule ^member/([^/]+)/(topics|posts)/?(page([0-9]+)\.html)?$ /search.php?author=$1&sr=$2&start=$4 [QSA,L,R=301]
# GROUPS ALL MODES
RewriteRule ^(group|[a-z0-9_-]*-g)([0-9]+)(-([0-9]+))?\.html$ /memberlist.php?mode=group&g=$2&start=$4 [QSA,L,R=301]
# POST
RewriteRule ^post([0-9]+)\.html$ /viewtopic.php?p=$1 [QSA,L,R=301]
# NEW POSTS
RewriteRule ^newposts(-([0-9]+))?\.html$ /search.php?search_id=newposts&start=$2&sr=topics [QSA,L,R=301]
# UNREAD POSTS
RewriteRule ^unreadposts(-([0-9]+))?\.html$ /search.php?search_id=unreadposts&start=$2 [QSA,L,R=301]
# THE TEAM
RewriteRule ^the-team\.html$ /memberlist.php?mode=team [QSA,L,R=301]
По сути это штатный от SEO Ultimate, только добавлен R=301