Building Maven subprojects from main dir

Hi.

I have a large project (molnet) with subprojects that depend on each 
other. Currently, when I go to the subproject "extapp" and build it in 
NetBeans, the build runs from that subdirectory. So it does something 
like this:
cd C:\_tmpC\mlnet-dev\molnet-extapp; "JAVA_HOME=..." M2_HOME=..." 
install -s ../.mvn/settings.xml"

What I would like is to configure NetBeans so that it builds from the 
main project directory, but only for a selected module. Something like this:
cd C:\_tmpC\mlnet-dev\molnet; ... -s .mvn\settings.xml -pl molnet-extapp 
-am install

Is this easy to set up in NetBeans?
The problem is that when I build from the subdirectory, Maven tries to 
download subprojects from the local repo, which is slower and less accurate.

Cheers,
Maciej Nux