First off, I wanna thank the Developer (Adesh) for creating this sweet piece of content management system in the first place. Really man, a Million thanks to you!

Now, I gotta put a Dagger in your Chest. You see, buddy, you just forgot to utilize 2 cute little important features in the back-end of your script.
Now, I know a lotta folks including yourself must be thinking... what could that possibly be?
Well, behold my friends! I'll show it to ya. Just mind the Points I mentioned below:

Store attachments on a sub-domain rather than the Parent Domain
Restrict users (according to Primary Role settings) from creating Topics under a specific Category

Now, the Question is... why is it so Important?

Well, the Answer is very Simple.

If you store attachments on a different portal, say a sub-domain... it'll improve overall Page Loading Speed tremendously. Like you know, if 10000 folks upload Images on the main Domain with 50 Images per Page and 1000 folks access the Website at the same time... you can Imagine how incredibly it'll slow down the response of the server.So, you gotta use the sub-domain to store attachments. Just like YouTube, Amazon and WordPress sites do.

Now about the Restriction:

Let's just say there are some users that I don't want to allow create Topics under a specific category, say News and Announcements. So, when I set the Rule for a user, say a Moderator... he won't be able to create Topics under News and Announcements but he can create Topics elsewhere.

But sadly, these 2 FEATURES ain't available in Codoforum. So my buddies @adesh, @admin and @WebCrew don't you folks think they are very Important to get 'em adopted in this Software?
If so, can you make 'em happen, cap'n?