Rewrite rule for url

[noras]

Hello, i have ipb forum and i want to remove the folder "forum".

Now the link is:

http://127.0.0.1/forumas/forum/79-a-test-category/

I want the link:

http://127.0.0.1/forumas/79-a-test-category/

And is it possible to add the symbol "t" before number 79 ?
The 79 number is dynamic.

The .htaccess file:
<IfModule mod_rewrite.c>
Options -MultiViews
RewriteEngine On
RewriteBase /forumas/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /forumas/index.php [L]
</IfModule>

Thank you