Thanks a lot for posting this. I have been looking for thai support for the longest time.
Since the website is in thai, I'd like to contribute to this by translating the method I used to load thai into my curve 8320.

1. Download JL_Cmder by googling for it

2. Extract the file and in the extracted folder, look for JavaLoader.exe and copy it into c:\

3. Download net_rim_font_thai.cod (again you should be able to find this by googling for it. I'm sorry but my post count is not high enough to post links here.) and save this file same place as JavaLoader.exe from step #2. This is the file that will load into your BB phone when we execute step #4 and is the file which allows you to read thai (not sure if you can type thai though)

4. connect your phone via usb to your computer, then go to Start->Run-> type ". Then in the dos window, type in cd c:\ to change the dos directory to the c drive, then key in JavaLoader -usb load net_rim_font_thai.cod (note space infront of dash, not case sensitive)

You shld see some kind of file loading being executed and once it is done, your phone will restart and viola, it will be able to display thai (you wld not be able to select thai in the language options but it will display thai properly)

Hope this helps!!!

PS: My bold is from Starhub (Singapore) and it comes preloaded with Thai. My guess is for those who want thai in their bold to dl and install the OS from starhub at blackberry's North American website for downloading phone OS