Thanks delicjous, that actually sounds simple enough... I've been able to accomplish everything I've needed to do so far with editing the header template (and even the display_Forums_list template for a few other things)... however, now you've got me concerned about performance issues...
Would your suggestion use less resources than using something similar to...
--------------- Added [DATE]1606724368[/DATE] at [TIME]1606724368[/TIME] ---------------
Although I'm not a coder or anything, it seems like to me if there could be an extra column added to the database table for each forum\channel (whatever) for a more descriptive title and description (not to mention breadcrumb title). It would be a lot easier for me to do what I need to do and possibly less resource intensive.
First you use multiple if statements, which could be done with only one if you use an array.
Each if-condition needs performance (not that much, but you should use one if you could)!
Second you should use template-hooks to show any of your custom-content. The templates try to merge all your custom-stuff on updates. If this fails you use the old core-template and that could break your page in worst case. Just search for hook in the header template and you could see the locations in the template.