Alright sorted the problem!
Turns out the example (which was commented out);
only sets the character, you needed to search the wiki page for this;
And the reason it's not a great idea to include dpkg and rpm support is because they're dysfunctional with arch, inside arch PKGs you've got various files that tell pacman where to place files, what files to update or ignore if they've been modified by the user, how to know what file is owned by what package.
dpkg and rpm contain none of that information, if you install one of them and then decide you don't want the package, great, just remove it and be lumbered with hundreds of random files scattered all over the place, and if there's any in places like /usr/src and there's a big change with the folders and how arch uses them, you won't be able to update because you'll have a bunch of orphaned files that pacman can't find a package for and refuse to update packages because of problems with files being where they shouldn't be.
Okay, that's what I was curious about. If they ran properly and didn't break the system. If it's going to break things, then it's not worth it.