People wanted more emoticons but it's unlikely that the admins get around it, so I've made a simple greasemonkey script that does this for us.
This will only work for Firefox and Chrome.
Now MyBB got several protections to prevent direct writing in the message box so considering Cannon would have been pretty unhappy if the script hacked the pages to allow it, I didn't do it. Firefox prevents directly writing in the clipboard from javascript depending on user security configuration, so I decided to skip that all together so it works for everyone.
Instead, when clicking the emoticon, a small window will appear with preselected text. All you'll have to do is copy the code with Ctrl+C and paste it in the message with Ctrl+V. Essentially it's just like posting an image, just that the link is right next to you.
These are the 20 I've added, asking people in multiple chat what they'd like.
=== For Firefox ===
You have to download the Greasemonkey extension first, it only takes 10 seconds.
Install the script by clicking on the green "Install" button located at the top right of the page. Don't click on the advertisement thingy that's just above the description.
Greasemonkey will ask you if you want to install it. That's up to you. If you accept this mission, Mr Bond, it should activate itself automatically and the next time you create a new thread, make a new post, edit a post or send a private message, you should see the 20 additional emoticons in the list.
In the event they're not here, check if the script is activated. Click the Firefox button and select Extensions. Select User Scripts and check if the "Additional Emoticons for Disco Forums" script is activated. Turn it on if it isn't, but that shouldn't happen.
=== For Chrome ===
Chrome supports Greasemonkey natively, but you have to pay 5$ to be able to upload "official" scripts. So hell no.
Head to the Chrome Store and download the TamperMonkey extension, that allows you to directly install scripts from userscripts.org (very useful website by the way, you might find something useful).
Install the script by clicking on the green "Install" button located at the top right of the page. Don't click on the advertisement thingy that's just above the description.
As you click Install, a window will appear asking you if you want to install it in TamperMonkey or directly in Chrome. Click Ok to install it in TamperMonkey. If a second window appears telling you it's going to reset the script, that's ok, press Ok again.
Now, next time you create a new thread, make a new post, edit a post or send a private message, you should see the 20 additional emoticons in the list.
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If you encounter a bug please let me know, but I made this extremely simple and browser friendly so there shouldn't be too many problems.