filter with connection

i created 4 custom post types (i have good reasons to create custom types and not using taxonomies for this). Between the 4 types i created 4 different connections, using posts 2 post. Works great this far, thank you, scribu and alex.

Now i want to create a page with 3 filters, filtering the 4th custom type: shops.
1. area (centre, north, south)
2. goods (electronics, clothes, food)
3. brands (apple, nike, nestle)

i try to create a query combining a selection of the 3 custom types. So i want to select all shops connected with centre, north, electronics, apple. Is this possible with posts 2 posts?

thanks, John

http://ww.wp.xz.cn/extend/plugins/posts-to-posts/