Abstract. In this paper, we review our Multi-Agent System (MAS) architecture (2LAMA) proposed to assist existing MAS. This architecture consists of two levels: the conventional MAS system and an additional meta-level in charge of assistance. We illustrate our approach in a Peer-to-Peer sharing network scenario and compare it with the commonly used BitTorrent protocol. Experiments show that the cost of adding the meta-layer is lower than the obtained benefit. We conclude by claiming that our approach provides the system with the required flexibility to deal with dynamic environments. Keywords. MAS, Organisation, Coordination