The files for the VS application are under the VS folder.

The files for the motes should be placed under:

/opt/tinyos/apps/Mote and
/opt/tinyos/apps/MoteBase

The VS folder contains the following: 

1) API directory: contains all the standard types used, the aggregator 
files for
the two applications.

2) Interfaces directory: contains the interfaces used including 
VSProxyAccess, Aggregator, and ResultListener. The Interface folder also 
contains the Query object used to pass between the various levels of the 
application.

3) net directory: contains all of the java and class files need for 
communication between the java app and the motes. The net folder also 
contains the TOS message type VSQueryMsg.

4) VirtualSensor folder