[PROBLEM] egalax Touch Screen Calibration Inverted

[seanM]

Hey,
I'm setting up xbian for a car pc I've been following the guide on instructables.com and I finally got the touch screen working, but the Y position? (up/down) for touch is inverted. the right and left positions are fine just the up and down are wrong. I couldn't find anyone else having this problem on the forums.
could this be solved by going to the egalax programming and changing the y position some how?

I'm using the latest version of xbian and i installed the Egalax using this
wget https://github.com/brantje/xbian-touch/raw/master/install.sh
found at http://markamc.traki-iski.co.uk/
I'm not sure if that's a good install or if it works this the newest version of xbain?

I'm pretty new at all this and I hope that's enough info to help me

I want to thank everyone in advance