Modded map updates possible?

[SterkeYerke]

As many of you probably know, the RT4 and RT5 have been abandoned by PSA since 2016. The maps we've got have certainly become a bit long in the tooth sooner than many of the cars themselves. Now, since it's possible to mod maps to an RNEG or NG4 system using map updates from BMW's CIC Premium system, perhaps there might be a way to add more modern maps to our systems as well? RT6 map updates, for instance, surely look awfully similar in file structure to the latest 2016 maps for the RT4/5. In fact, their speed camera updates are all bundled in the same package, of which the latest (unofficial?) release I could find dates from january this year. Has anyone ever tried putting more recent maps onto an RT4 or RT5? Or does anyone know of a satnav system from another manufacturer that might use similar maps?