Yeah, loading screens all have to be 1024 x 768. As you can imagine, practically nobody uploads pictures at that resolution anymore. So I had to downsize and crop nearly every single picture in this pack! That took me quite some time. As for finding the images themselves, I've been building them up for years, I love looking through gallery's on deviantart looking for inspiration for my own artwork.
It's actually not very difficult to make permanent arrows work for another mod. You just need Notepad++ to open the file in question.
There's a file in the Data folder called "descr_effects_impacts.txt" You open that with Notepad++ and then do a control+f search for the following lines:
effect_set arrow_impact_ground_set
effect_set bolt_impact_ground_set
effect_set steel_bolt_impact_ground_set
You just need to change the "play time" setting under each one to 3600 if you want them to last for an hour.
It should look like this when you're done with each:
Let me know if you need anymore help.