ok what do i change in .htaccess so that instaed of having http://mydomain.com/index.php?id=main i could make it to

but before that how can i view my current .htaccess file
i am hosted with hostrocket but as they have set it so users cant view the file for reasons such as deleteing it
by mistake etc its a hidden file which ftp softeare do i need to use to view that file?

also as i have some long links how can i set a script so i inster the actula link but i only link to that script so it would look something like this goto.php?id=advert and it redirects to the url!

I saw somehing on thing or another board but forgot to make a note of it on how it was done!