We no longer sell the TZT2 but the current TZT3 units sold include the maps preloaded, yet still require a purchased license to function.
Yes updating your older chart card data would be required as part of the process. If the MFD has old software it should be updated (currently 80.01) as well because before 6.23 CMOR charts were not supported. To update the chart card it should be removed from the back of the MFD while it is turned off and returned in the same way. It is simple computer tasks to update. The files are downloaded, unzipped, and then copied over onto the chart card. The MFD will see the new files on boot up. Once the license unlock code is inserted the data becomes viewable.