Postal 2 Modding Help Thread

Hey all. I'm currently looking for help with making a Postal 2 mod.

I'm new to modding and I thought I'd start simple with a melee weapon, but I keep running into numerous issues.

For one, I'm not sure if any of my work is saving. I open up the animation file after changing and saving it, and none of the changes I've made seem to be there.
I also compiled the mod to test it, but I can't get the Postal2 to launch the testmap.

I'd appreciate some help