Installing software from source...need a .dsc file.

[Redefined Horizons <redefined.horizons@gmail.com>]

I've got a couple of programs I'd like to install on my Debian Sarge
system that are only available in source code. There is no .dsc file
for download. I'd like to install the software via APT/Synaptic. Is
there a way I can generate a .dsc file for the source code? What
exaclty is a .dsc file, and why is it needed?

Thanks,

Scott Huey