Anyone want to help me mod my phone? Its a LGdlite/GD570.

A little while ago, I found a file that was made when the phone accessed the microSD,to log the last song played. If anyone would like to see them, I'll put them
up. I want to mod the theme,(add colors&designs) and have the text messages saved to the microSD. (microSD is 16gb) I can work with Windows or Ubuntu. The phone can view .txt files.
Here's what the phone left on the mircoSD fs:/card0/audio/music/01 - meds (feat.vv of the kills).mp3

I came up with an idea.
Make a script to change the default save location of the text messages,to the microSD.
But I have no idea how to script....

To change the theme,I think I'll need to change what happens when you connect to a computer. Maybe have something to access the phone's main files, I imagine that adding colors would be simple enough.

So is anyone good at scripting,or know anything that might of help?