I would imagine the process is similar to what is listed in his KB for AdXpansion, have you tried following this with the JA code?
http://support.mechbunny.com/Knowled.../0/adexpansion.
Another KB article is at
http://support.mechbunny.com/Knowled...-in-player-ads.
Konrad is pretty quick on responding whenever we or our clients contact him, if the process is slightly different for them I'm sure he could help out.