If it is a tug kit you are after then the Model Slipway Al Khubar is a fairly simple one, with precut parts and decent instructions and drawings.
(http://i124.photobucket.com/albums/p8/DickyD_photos/Al%20Khubar/DSCF2559.jpg)
http://www.modelslipway.com/alkhubar.htm
My build--------- http://www.modelboatmayhem.co.uk/forum/index.php?topic=19615.0