So, I like the way this classifieds system looks. Three questions: 1) Will it work on XF2.1? 2) Are you able to add in custom or 'virtual' currency types. For example, let's say it is being used to host trading of in game items. The listing would not be for cash it would be for 'gold' or "xyz-game-gold" -- does that type of functionality exist? 3) Would this work with XC Feedback System?