Before reading, read this:
Greasemonkey is an Add-on for userscripts,
and this tutorial is all about it.

Since some people want the level icon selecting suggestion implemented, a Userscript from Greasemonkey should make them happy in no time.

Changing your Level Icon with a Userscript for Greasemonkey won't affect the view of other NG Members or guests, it will only affect the owner's view, Sorry.

Well let's begin, If you want to change your level image to any level or, in fact, any image over the internet, All you need is to Install a specific userscript for Greasemonkey.
First, you have to install Greasemonkey on Mozilla Firefox Only, I'm sorry for Google Chrome user's, but you'll have to download Mozilla Firefox if you want this to work, Although! There is a version of Greasemonkey for Google Chrome called "Greasemetal", and it's harder to use, but if you want Greasemetal you'll have to find out how to use it by yourself.

1. Download Greasemonkey.

You have Greasemonkey installed on your Firefox? Perfect! Check if your greasemonkey is enabled by clicking Tools at the top of the Mozilla browser, then select Greasemonkey and click Enable if it's Not enabled already.

After Greasemonkey is enabled, you are now ready to install userscripts! There are a lot of Userscripts for NG, and not only for Newgrounds, for a lot of other sites you might not know,
Now enter Userscripts.org to look for the userscripts you want for your browser or Newgrounds! If it's so hard to find them, just enter "newgrounds" in the Search Bar and you'll be able to find every NG userscript available in userscripts.org .

Here's the Link to the Newgrounds Change Level Icons for Greasemonkey Userscript.

Have fun with Greasemonkey! It's pretty easy once you know how to use it! You don't know what you can do with such thing ;)
Oh and by the way, Any questions are accepted :).

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