As long as your device has a MS BT stack and is running on 2003/2003SE, this should work.

Installation:
Just download the airfagev BT Chat.zip file, extract on your PC, transfer to your device (e.g. Storage Card\Program Files\airfagev BT Chat\ folder), and run the airfagev BT Chat.exe (you may also want to create a shortcut of the exe file on your Start Menu.) Sorry, no cab file for this one.

If you already have airfagev mobile on your device, you may opt to download airfagev_BT_Chat_whithout_iconfiles.zip (use "Save Target As..."). Just extract the zip file and place the extracted files on your airfagev mobile folder. And, just run the airfagev BT Chat.exe file (or create a shortcut on your Start Menu). In this case, you won't have to have two instances of the icon files used for the smileys on your device.

Note:
If you want to chat and receive messages only from those BT devices you have already "bonded/paired" with, don't set your BT to "discoverable".