all you do is click the submit button .. what exactly are you having trouble with?
if it cannot write to your .htaccess it provides the code, and YOU have to copy and paste that into your .htaccess
(this is pretty basic crap here)
you even said this:
Seriously, though, even though I’ve changed the write permission for the .htaccess file to GROUP (as per Codex instructions), I am still getting this message at the bottom of my Settings>Permalinks page:
If your .htaccess file were writable, we could do this automatically, but it isn’t so these are the mod_rewrite rules you should have in your .htaccess file. Click in the field and press CTRL + a to select all.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
Why wouldnt your next step to do the obvious, follow the instructions, and edit your own .htaccess?