First of all copy msg.r01 from (z:\resources\messaging)
then open options in mobi hex and searh msg.r01
when your mobile screen look like this .Then Edit it by press 5
After press 5 MobilHex show this
Then go on INBOX and press middle soft key to edit it.like this,
then Rename it as you want
after adding your name press left soft key and select ok.
then press exit and exit mobil hex.Now move the file that you edit with MOBILHEX to C:\resources\messaging(if folder (messaging) doesn't exist then create it)
Now restart your mobile and its done.like this
thats my inbox name.