Where can I find the following font mod? I used to use it myself back in the day but can't for the life of me remember what it's called or where to get it.

That looks like Brandson's UI if I remember correctly.

XIstyle is what it's known as now. You can change your Icons and UI, I haven't been able to get the font for the chat window to change without causing crashes.

Have you set your fonts to Compressed in FFXIconfig? That's how I got mine to work.

You can dat swap, it's OK. This isn't a 'plugin' in the same sense as recast is a plugin.

Where do i put the file after i download it? Been searching and watching videos but noting works.

Did it yesterday. It's very simple to do, just make sure you follow the FFXI way of copy/pasting the ROM files instead of the Ashita3 way, because plugins are disabled on Nasomi. There is a "megapack" that the creator seems to update monthly, so you can download all the completed zones at once. The ReadMe file in the zip should explain everything.

On a side note, I personally don't like the Reshade presets he created but you can easily turn them off with a keystroke (you have to manually set in Reshade)