How to Remove, Change or Delete "Designed by TemplatePlazza" in Joomla 1.5 Template

This article/post is a response to the request of the comment from dbayu in How to Remove or Delete Vinaora Visitors Counter Link article.
In this case (I named it: Case 1 - Resto Plazza Template, because it'll be different case with different template from TemplatePlazza... I guess... ^_^ ...)

Please Note that before we go, I want to tell you that this is Just Sharing All The Things I Know. And Please READ Their "Term Of Use".
Here's what I know:
After "a deep research".. ;-P .. WHOAAA!!!... there're some php file that need to be edited, those are:
- skeleton1.php
- skeleton2.php
- skeleton3.php
- skeleton4.php
- skeletondefault.php
- skeletonmobileandroid.php
- skeletonmobileblackberry.php
- skeletonmobiledefault.php
- skeletonmobileiphone.php
- skeletonmobileopera.php
- skeletonmobilepalm.php
- skeletonmobilewindows.php

We can find those files in (in this case, my localhost site's name is "justsharing"):
"C:\wamp\www\justsharing\templates\resto_plazza\skeletons\"

Find These:
<!-- ======= BLOCK FOOTERLEFT ======= -->
(in skeleton1.php until skeletondefault.php files)
..... AND .....
<!-- ======= BLOCK FOOTER  ======= -->
(in skeletonmobileandroid.php until skeletonmobilewindows.php)

And Fine This Line:
Designed by <a href="http://www.templateplazza.com" target="_blank"><strong> TemplatePlazza</strong></a> - All Rights Reserved

I Changed It to:
Managed by <a href="http://adedarmawan.blogspot.com" target="_blank"><strong> jsatik</strong></a> - Just Sharing.

Now, it's up to you to...

PS:
You can change "logofooter.png" with yours if you want to.
I'm Not PHP Programmer. I just used my "instinct"... ^_^
WARNING!! This is for education purpose only...