Hvala Vam svima na odgovorima, evo kako sam resio problem.
Kôd:
RewriteEngine On
RewriteBase /script/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+[^/])$ $1/ [R,L]
RewriteRule ^login(.*)/$ /script/login.php [L]
RewriteRule ^admin/(.*)/$ /script/admin.php?act=$1 [L]
RewriteRule ^(.*)/$ /script/index.php?act=$1 [L]
Kazu da je jutro pametnije od noci...