So far, I have been able to do most things with minor code tweaks, template modifications and css. Some things though will require me to dive further into the code. I have added the sidebar to several (not all) pages. I need to show ads, but I also want to use it to show content (data) that's not normally available there.
For example, if I wanted to add the users online to a sidebar on the forum and thread view pages, what should I do or where should I start researching to make that information available for the sidebar on those pages?
I am looking to do this with other data as well, but I hope that once I figure out how to do it with one set of data that I can use the same concept elsewhere.