User blog comment:Krysto2002/LU CON: the Universe's 1st Prop convention!/@comment-1460686-20110624123735/@comment-1460686-20110625122531

it clearly says "in fact LU CON will host property "booths" where you can show off your individual creations on your property, submitting these creations rather than the property as a whole." which i think means you mail it to the property host who puts it on the property. BTW the alien is based on this and you can download the ldd here