I can't be a sifu, I was flattered.
1. Allocation
mainmenu is also a module. You can enter "backend -> Modules -> site modules", then click the name of mainmenu, the configuration page appears. You can allocate this module at right side. There are a list of all pages/menu items. If you just want to show mainmenu at frontpage, then choose two menu items named home from the list. They should be "mainmenu | home" and "topmenu | home". Don't forget to press Ctrl key to do multi choice.
2. Cancellation
Unfortunately, the pathway is not a module so you can't cancel it from the backend. You have to open the index.php file of the current template and delete the script of pathway. It may be something like
<td colspan="<?php echo $colspan; ?>">
<div id="pathway_text">
<?php mosPathWay(); ?>
</div>
</td>
Just delete or comment out all lines between <td> tags. In this case, you should delete following sentences:
<div id="pathway_text">
<?php mosPathWay(); ?>
</div>
3. Copyright
Well, this question has been asked for many times from many users. In fact this has nothing to do with the configuration. It should be hacked to be get rid of.
Open the /includes/version.php file and search "powered by", you will find this sentence. You can delete it or replace it with any thing you like. Remember, if you want to show Chinese words, maybe you have to save this file in utf-8 encoding aftered the replacement.
