yes, they are very easy to breed... but, boy... do they stink..
The reason why they put wood chip in the package is to absorb the smell..
After all, you need a raw meat/ liver in one of the breeding step.
So, if you gonna do it, i suggest not doing it in your main house.
http://www.adcham.com/html/insects/insects-fly-rearing.html
Enjoy