How can I enable border regions via the bashed patch? I cannot find the "tweak" option anywhere, and I haven't found the answer on the UESP site or the wrye bash site help. Thanks in advance!

You cannot enable via the bashed patch, but there should be an INI tweak that you can enable through Wrye Bash. If you are using version 283, I believe that tweak is found amongst the set of INI tweaks Bash provides. You can always open up a simple text editor, write in the one line "bEnableBorderRegions=0", save the file as ".ini", saving it to the Oblivion\Data\INI Tweaks folder. That is how you add INI tweaks to Wrye Bash.

Edit: After creating the INI file, launch Wrye Bash, go to the INI tweaks tab, right-click on your tweak, and choose...enable, I think it is...?

I know how Tomlong75210 likes to keep things organized like this, but I find it much easier to just open up oblivion.ini directly and make my tweaks. Always making a backup first, of course.

Actually, I edit the Oblivion.ini directly. I rarely bother with backups. Use comments to preserve the defaults values. If I needed to regenerate it for some reason, I need to redo the tweaks. I do keep one backup in one of my BAIN projects, but it is seldom updated. Once I figure out how, exactly, the Bash INI Tweak feature works, I may switch to using it. So far, my ventures to use that feature have failed.

Edit: Using the premade tweaks seems to work fine. I was trying to add various other tweaks, and the results were not to my liking.

Fortunately the border regions tweak is part of the default and works as expected. It's a handy thing to have on the menu. I don't know how long it's been there but 282 has it.