If you want this to only be visible by the admins, do this:
Install the modification and then open the "forumhome_serverload" template.
At the very top of the template add:
HTML Code:
<if condition="$bbuserinfo[usergroupid] == 6">
Change the 6 to reflect your admins usergroup. It is 6 by default.
At the very bottom of the template add:
Now if you are an admin, you will se it and if you are not, you won't. You can add additional usergroups by adding a comma after the 6 and adding their usergroup.
(I didn't click install because i didn't install this. I just downloaded it to see what you named the template. lol)