LinuxQuestions.org - how to make a package to install it dependencies?

Howdy,..

i've started reading this manual to understand how to create better packages for debian so i have created a small package that i call klthemes
so here is the control file :

Code:

Source: klthemes

Section: contrib

Priority: extra

Maintainer: Jabka Atu  <mashrom.head@gmail.com>



Package: klthemes

Architecture: all

Depends:

Description: Collection of kdm themes collected from kde-look.org by Jabka Atu include the next themes: hardDrive, Debian Orange, Technodream, daemonic-smegma_1.0, devil,          yellowrose, sidux-highway,optical scanning 2007, KdmLinux, Kubuntu KDM Gears (tux)

Summary: collection of kdm themes

all nice and good but i need little help :

1.from some reason instead of using one line for summary and more for description all went to summry.
2.i need to add depends: kdetheme and some how to make it install it if it isn't allready installed:
i understand that i need to use preinst script could you please provide an example for example if i have foo dependency how would my preinst will be ?