RewriteEngine on
RewriteBase /download/
RewriteRule ^index.html$ index.php [NC,L]
RewriteRule ^new.html$ index.php?act=new [NC,L]
RewriteRule ^top.html$ top.php [NC,L]
RewriteRule ^dir_([^/]*).html$ index.php?cat=$1 [NC,L]
RewriteRule ^file_([^/]*).html$ file.php?view=$1 [NC,L]
RewriteRule ^str_([^/]*)_([^/]*).html$ index.php?cat=$1&page=$2 [NC,L]
<Files ~ ".dat$">
 Deny from all
</Files>