The market way to do all that is for operators with capital to buy up all tranches cheap, paying only cents for the subordinate ones to be sure, and then do deals with the senior class to recreate the original loan portfolio. Next step, triage that portfolio, all the performers repackaged and sold. All the non-performers go to workout people who can expedite all the collateral churn side of things, where right now the banks are swamped and securitization hair gums everything up.
If there were only one lender and the pols would stop monkeying with the foreclosure laws thinking they can make it all go away by just not letting anyone at the collateral, then it'd be RTC easy. But neither is true. That being the case, it may wind up that it has to be Fannie and Freddie doing the first step of the above, with public backing. Hopefully indirectly (Fed buying their debt etc).
At last.... a reasoned, succinct analysis that I can understand describing a solution.
.....The right thing is to first recreate whole loans....
Does this mean to separate out the individual loans from the tranches? Or, does it mean that the original loan has been somehow split and needs to be reassembled?