okay some of you might have be having a problem doing this mod as where the text messaging app works but wen u tap on convo the message app would freeze as for me ive had that problem too. ive finally got the codes to work a while back, so here is the patch file to make it easy for everyone to do and so it is easy to reapply after an OTA update.
also can be found here:
Character Counter Patch
Alternately u can put these files in there directory:
/usr/palm/applications/com.palm.app.messaging/
app/utilities/CharacterCounter.js
app/controllers/chatview-assistant.js
app/controllers/compose-assistant.js
app/views/chatview/chatview-scene.html
app/views/compose/compose-scene.html
stylesheets/messaging.css
Theres a pic of the mod as well