Control M = 0xec3e82f8 0x8bd88057 "Build Passenger Ferry Terminal"
KeyCombination is any combination of the keys that you want to activate this function
MsgID is the coded ID in the games exe that activates this command. Kinda wierd that they would call this a message ID, but oh well. Perhaps it calls an ingame message code.
data1,2,3 are specific data IDs (which are usually exemplars) that are used in conjunction with this action. The above example has the data1 as the exemplar for the ferries.
Description is a simple description of the function of the key combination
These can be used in pretty much any way you want. Adding a new key combo is reliant on knowing the MsgID for it as far as I know.