You only need to edit pkt files if your mod includes extra maps. Otherwise, simply having the assault.pkt file in your RA2 directory will work (as well as the assault maps mix files).
To Infraid, the purpose of this topic is for you not to read it
look at the subject. It says "Attention: Cannis!". So I would not expect anyone to understand except Cannis. But since you and Ren are interested, what this is all about is Cannis and Deezire's excellent Assault game mode. I wanted my mod to support it, and it says in a certain readme file that you must contact Cannis to have your mod put on the site that lists the mods that support the game mode. That way, the site gets better, my mod gets better, and everyone's happy. The readme file states that you must include your mod's name and URL, as well as what mappacks are supported.
Now, I had sent the email to Cannis, but it didn't go through for some reason. So I posted the message here, in the knowledge that Cannis would see it.
And that's all I have to say about that
Thanks for posting the link BTW Infraid. Now I just have to wait for Cannis to reply to this thread...