Adding to mainmenu

[GTTeancum]

I'm still pretty new to Halo modding, but lets say for kicks and giggles I knew what I was doing already. I'm trying to figure out two things:

(yes/no answers will do, but if you want to elaborate, feel free. I just need to know before I dive in)
1-Can you add vehicles like the Heretic Banshee to mainmenu Quick Options by adding them to shared.map? I'd also like to add the Mongoose from Havok, but I know that involved replacing animations, so I'm not going there yet.
2-*If* a map supports the Fuel Rod Cannon, can it also be added to the list of available weapons? (or is it automatically added to the list when that map is selected?)

I apologize for the n00by sounding questions. I did search, and I found a lot of useful stuff on the subject, I just wanted to get these two questions out of the way before I dove in.