oldpool3

We have an old pool at the house we moved into...been empty for a while. Want to put in a new liner but noticed a problem. The bottom of the walls in a couple of sections have rusted and no longer set in the lower track thing. Is this a total loss? It is surrounded by a deck. I could place boards along the bottom attached to the deck posts and backfill. Would this hold or fail in a spectacularly dangerous way? No money to replace entire pool so its fix or to the dump with pool, deck and all. Thanks Gary