No lesane. It won't work.
He placed the Away SQL part AFTER the 'WHERE'. It will never work.
The instructions were to find a line like (cut for shortness):
$DB_site->query("UPDATE user SET birthday='".addslashes($birthday)."', ........... ,usergroupid='$bbuserinfo[usergroupid]' WHERE userid='$bbuserinfo[userid]'
And change it to (cut for shortness):
$DB_site->query("UPDATE user SET birthday='".addslashes($birthday)."', ........... ,usergroupid='$bbuserinfo[usergroupid]' [high]$awaysql[/high] WHERE userid='$bbuserinfo[userid]'
TheComputerGuy didn't copy and paste the entire line, he simply placed $awaysql in the WRONG location (after the WHERE). That's why he has errors, and removing the coma (which shouldn't exist there anyway) won't help.
It would help, if he made sure he installed things as required