Translate the following English sentence to French:
"All means should be investigated in order to facilitate administrative cooperation, following the example of the Odysseus programme, a third of whose projects that have been retained for 2000 are already contributing to the fight against illegal immigration."
Il conviendra de rechercher tous les moyens de nature à faciliter les coopérations administratives, à l'instar du programme Odysseus dont un tiers des projets retenus pour l'année 2000 contribue déjà à la lutte contre l'immigration clandestine.