маленький пример
RewriteEngine on
Options +FollowSymlinks
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^page/(.*)$ /?mod=page [L,QSA]
RewriteRule ^toppage2.htm$ /?mod=toppage2 [L,QSA]