Quick guide fo convert Nuvi 1490 US to Nuvi 1490 TH

1. Delete Gupdate.gcd from your Nuvi 1490 US.
2. Backup your GPX.
3. Copy th_TH.kbd , th_TH.glx and 006-D2225-00.bin to their folder.
4. Downgrade your FW Nuvi 1490 US to 3.00 US by 1490 300US.rgn with Updater.
or nuvi13xxand14xxseries_regionfileonly__300.gcd.
5. Convert your Nuvi 1490 US to Nuvi 1490 TH by 1490 3.00 US TO 1490 3.00 TH.rgn with Updater.
6. Reboot and checksum your Nuvi 1490US it will be 1490TH FW 3.00.
7. Your Nuvi 1490 is not permanent firmware you can not update directly by original TH firmware
but it work for JCV and Lane assist.

instructions reproduced above.

question:

1. which directory to copy 006-D2225-00.bin to? there is no font directory in 1490
2. updater refers to webupdater? but webupdater does not seem to allow me to choose rgn file on my computer to flash...