HaloMods "Classic" Read-only Archive

ok here is the problem
I am trying to patch a map with the weapon enchantment mod
I select the map in the top box
then I try to select the weapons_enchantment.ppf file to put it in the bottom box, a message saying it is not valid pops-up and the file is not in the box
wtf do I do?

you should double click the ppf(when you do this the ppf file will already be selected)all you need to do is put in the .map file that you are patching in the ISO box and click apply.