Adding a language to s500i

Hello,
First of all just want to say this is a really great forum, glad i came across it :)
I have read the dictionary of terms and had a quick look around but still don't quite understand how to accompish this task.
So basically my girlfriend wants to add korean language support to her s500i she doesn't want to change it completely just add it so that her phone can read her korean music she puts on it instead if displaying large boxes. I have downloaded setool so how do i go about doing this?
Thanks in advance :)

I think the simple way is to download the firmware and custompack supporting korean for s500i , and use setool2lite to update the firmware of the phone .