I reckon it'd be a cool idea to implement a folder system for the rockets and planes, I always forget which rocket was designed for what or which is more advanced, so maybe a folder system for rockets for mun trips or rovers or duna satellites could be useful, of course you custom name them yourself instead of the game, think its a good idea? So for example; you name a folder 'mun' and in there you have the ships that are designed to go to mun, such as refuellers, probes, station parts etc or you could name another one 'stations' and in there you have kerbin, duna, mun stations and parts of stations to be sent up I think it would save loads of time trying to find ships, I have about 70 ships and I like to go to the older ones to modify them for different uses so I dont really want to delete them