I would like to know if this is allowed.

https://github.com/fedddddd/h2-mod

This is a modded version of MW2R that allows for the developer console to be unlocked, and commands. This causes no physical advantage to my knowledge. I use "r_fullbright 1" to make my fps be higher than usual. Which allows for higher jumping im assuming.. (if mw2r is still using with the old cod4 and mw3 engine)

No this wouldn't be allowed for campaign runs. However there may be some boards added either here or on category extensions for the spec ops levels some time in the future.