[header] How to install cabling in a pre built home [title] First thing you need to do is decide on a " path " that you want the wiring to take throughout your home. [step] Remember that in most cases the wall studs will be placed vertically, floor to ceiling. Ceiling joist positions vary from builder, house, code etc. 
Go into the attic and look around, or cut a small hole somewhere in the ceiling and take a look. [title] Keep in mind that less work is better.