I have some problem.
I installing this map by follow step:

1.Extract unzip file into:C:\Garmin\AG1-TH\
2.Incorporate the file AG1-TH.reg into the windows registry by double-clicking it.

but,I can not find this map in MapSource(6.16.3).

PS:My Mapsource version=6.16.3 with 6.16.3 patch file.