When asked about this in RTI @Cedia programming classes this year (again, like in every class I've taken) the response is the same .....

Not able to do it right now, with the way access of templates is incorporated into the program it it's isn't easy at this time to provide a way to have user edited templates imported into ID. Not only due to the way that section of the program is built but also the concern of the overall size increase to ID that this would cause. Because of these two reasons, R&D into this issue is very low on the priority list.