I'm going to give you the code changes but first I'd like to help you understand the point of that code change.
By enveloping the jumpbox and authlist (the "You can" "You can't" list) in a user logged in switch you display it only for those logged in.
The jumpbox isn't as important as the auth list as the auth list is redundant keyword dilluting text.
In addition the auth list can confuse those not technically adept. It says "You can't post" and such when not logged in and some users don't get that it says that because they are not logged in.
So the point of the user logged in switch for this is to only display this for logged in users. Since search engines are not logged in this keeps the redundant text from them too.
In that particular template the jumpbox and auth list are in different cells. So you'd need to use two sets of switches or the table will be messed up.
Basically you want to envelop the following in switches:
Code:<span class=gensmall>{JUMPBOX} </span>
and
Code:<span class=gensr>{S_AUTH_LIST}
</span>
Frankly I'd skip the jumpbox and just do the auth list. I don't really think the jump box is worth keeping for members only.
One word of caustion. Some browsers don't render an empty cell well. So I'd put a space ( ) outside of the switches just to be safe.
So change this:
Code:<span class=gensr>{S_AUTH_LIST}
</span>
To this:
Code:<!-- BEGIN switch_user_logged_in -->
<span class=gensr>{S_AUTH_LIST}</span>
<!-- END switch_user_logged_in -->
Remember to keep switches in the phpBB templating engine on their own line to avoid some problems.
If you want to do the jumpbox was well just wrap it in the switch the same way.