This article covers it all and more:
http://www.sports.fr/cmc/auto-moto/2...lineshome-page
Pescarolo and Gallopin went to Prodrive as soon as the AMR-One project was cancelled. They were impressed with the tub and figured it was exactly what they would have built if they had gone for their own clean sheet design. Pescarolo describes the AMR-One as a "failure with an engine that never worked" . So they are only keeping the tub, crashbox, suspension and maybe the transmission. They started late because they didn't have the budget. The car should be ready just before Spa so Henri asked for a dispensation to run the older 01 with 5.5 V10 at Sebring. They will get the answer Monday. It will of course be a 100% new aero design. Prodrive gave them the plans and drawing as well as the rights to use the tub - they will replace the AMR chassis plate with a Pescarolo plate. They are setting up a design office in England and some mentioned - possibly as a joke - that JHC could work with them. The budget for a one-car WEC season is 2 million Euros and 1 extra million for the car (including hiring new workers). They have no yet completely found the money for the year.
One last interesting bit about the AMR tub: they also chose it because it was designed with future "hybridification" in mind - probably with a recess in the tub - and they expect to install it late this year or in 2013.