Marketpress - Global List + Featured Images

I really need some help..

1) I need multiple featured images. The stuff suggested in other topics don't help.
2) I need the global list shortcode to display in a grid format. (for twenty twelve theme)

My setup is:

Multi-site Network
No Global search/cart (Using the chain payments method)
Framemarket/Gridmarket Theme
TT-Frontend Admin Panel

Please Any solution would be very much appreciated.