Adding replacement Alias to vhost.conf

[WillGonz]

So I know all the .conf files say not to edit them and to edit the vhost.conf instead.

I would like to add a:

Alias /cgi-bin/ /var/www/vhosts/blah.com/httpdocs/cgi-bin/
<Directory /var/www/vhosts/blah.com/httpdocs/cgi-bin/>
AddHandler cgi-script .cgi
Options ExecCGI
</Directory>

I need to do this so I can do http://blah.com/cgi-bin/helloworld instead of http://blah.com/cgi-bin/helloworld/index.cgi.
If I edit my last_http.conf it works fine, but that is not the best way.

My question is how do I make it so it cancels out the previous ScriptAlias and uses the one in my vhost.conf?
I tried and now it does " [warn] The Alias directive in /var/www/vhosts/system/blah.com/conf/vhost.conf at line 10 will probably never match because it overlaps an earlier ScriptAlias."

Thanks