Judging by the title, it's 'JVS Portal System', but the creator, Trader, removed it after the creation of the 'setPlayerTransform' event, but according to a post i read from 2009, only one person had it after it was taken down, but then they lost it, and i haven't seen it archived anywhere, so it might just be one of those add-ons that got lost in the sands of time