[jamestautges]

Go into the build.xml file and add something along the lines of the following code:

<exec executable="rm">
    <arg value="-rf" />
    <arg value="/path/to/robot/project/src/LibraryName" />
</exec>
<exec executable="cp">
    <arg value="-R" />
    <arg value="/path/to/library/src/org" />
    <arg value="src/" />
</exec>

This copies the library to the robot project's src directory which makes it available during the build. The rm makes sure that the directory is updated every build, in case the library has changed. If you're using windows, you'll have to change the command names, but this should work on any Unix system.