each dark basic pro project should have its own folder.
dark basic pro creates two files when you save it correctly
project file
and source code
this is a most basic setup
if you make a folder in your game projects folder called media
load bsp "media\ikzdm1.pk3","ikzdm1.bsp"
if you didnt have a project file and running the source without setting up around it
load bsp "C:\pk3files\blergh.pk3","blergh.bsp"
the latter is very bad, when you compile your game, it will either capture a whole lot of garbage into the final and when you have to send all the files it will be a nightmare to say the least.