maps are made in 3d software, then converted using the tools in the editing kit. the editing kit doesn't come with the cartographer installer, but it is found on the original h2 disc.
on this website you can find basic info to get started: http://h2v.halomaps.org/index.cfm?pg=6&sid=23
this game doesn't really natively support anything above 60 fps
normally if you disable the in-game frame limiter and are not using an external one, frames should be unlimited but you'll get issues with input and in-game effects