Two part question

I know that Wacraft 3 TFT has three fonts they use:
Song Light (True Type)
Friz Quadrata (True Type)
SquareGothicMd BT (True Type)

I know technically you should be able to import your own font and enter a custom path in WE allowing the use of your own font. So the question I would like to know is if anyone happens to know the custom path or if you can change the font at all.

(didn't know if this belonged in this section)

I know floating text is in a region and regions are square/rectangular, but can you rotate the text and say have it diagonal?

You can't change the font for maps, only for mods (which use MPQ loading upon wc3 launch)
Use an MPQ editor to open war3.mpq in your warcraft folder, all fonts are in the "Fonts" directory.
You can't have texttags diagonal, they will always face the camera horizontally.
Alternatively you can use this method to display diagonal text, be sure to read the limitations and differences between this and texttags.

Alright thanks that is what I needed to know