The london underground is compleatly made up of PSDL (Except for the stations, of course). This is why I thought it would work. However, MM2CT doesn't wan't to merge right. I'll try PSDL viewer. However, it never renders the PSDL, and lags my laptop to a compleat hault. I'll try anyway, though.
![Smile :)](./images/smilies/icon_smile.gif)