Rewrite Help

A while ago i was kinda getting there with Rewrite, but i've not done it in a while and totally lost it. Basically what im trying to do is if someone types "www.example.co.uk/sub/brochure", it to redirect to "www.example.co.uk/sub/index.php?page=brochure". Im not sure if thats possible or if it would have to be like ".co.uk/sub/page/brochure", but either way i cant get it working. Because the .htaccess is stored in the same folder as the "sub" folder, i tried "RewriteRule ^sub/([a-z]+)$ /sub/index.php?page=$1/ [R]" but that didnt work, and i tried messing about a few other ways but with no look, if anyone can gimmie a hand getting this basic one started im sure i can pick the rest up again.

Thanks

try this code

RewriteEngine On
RewriteCond %{REQUEST_URI} ^\/sub\/
RewriteRule ^sub/([a-z]+)\/?$ /sub/index.php?page=$1 [L]

Thanks, ill give that a try later on when i get access to a ftp, what does the REQUEST URI line do?

Thanks, ill give that a try later on when i get access to a ftp, what does the REQUEST URI line do?

it reads requested uri and apply next rewrite rule only for the matching

Oh, ok thanks. Im still VERY new to all of this so i have a lot to learn :P