ok guys would this do it...
# Turn off mod_security filtering. SMF is a big boy, it doesn't need its hands held. SecFilterEngine Off # The below probably isn't needed, but better safe than sorry. SecFilterScanPOST Off
# Pretty URLs mod
#
http://code.google.com/p/prettyurls/# .htaccess file generated automatically on: December 11, 2007, 19:27
RewriteEngine on
# Rules for: boards
RewriteRule ^([-_!~*'()$a-zA-Z0-9]+)/?$ ./index.php?pretty;board=$1.0 [L,QSA]
RewriteRule ^([-_!~*'()$a-zA-Z0-9]+)/([0-9]*)/?$ ./index.php?pretty;board=$1.$2 [L,QSA]
# Rules for: topics
RewriteRule ^([-_!~*'()$a-zA-Z0-9]+)/([-_!~*'()$a-zA-Z0-9]+)/?$ ./index.php?pretty;board=$1;topic=$2.0 [L,QSA]
RewriteRule ^([-_!~*'()$a-zA-Z0-9]+)/([-_!~*'()$a-zA-Z0-9]+)/([0-9]*|msg[0-9]*|new)/?$ ./index.php?pretty;board=$1;topic=$2.$3 [L,QSA]
Thanks guys...