For the extras you should watch Galo hen first then Lio hen because they're connected.
You can watch them before or after the movie but they are set before the movie so it gives more context to what was going on.
These English subs are only found in this release.
The movie includes 2.1 and 5.1 sound and Japanese subtitles.
Edit: OH NO!!! I forgot to include the sub fonts in the MKV!!!
If interested download them here: https://www.mediafire.com/file/hx4lzzt3d6qfctd/promare_sub_fonts.zip/file
It's not like I did anything fancy but still.
Also if you only want the subs go here: http://www.mediafire.com/file/bjxf6bfn3qzhs9i/Promare_subst.zip/file