There's a couple of ways to fix this to eliminate the premine, but it would be quite a bit of effort.  At minimum it would require some kind of transaction/block crawler script that would trace the premine and eliminate it from either a brand new blockchain (that is all valid minus the premine transactions), or through some huge If-statement baked into the new wallet code that blocks those "bad" coins.  Basically the equivalent of carefully orchestrated database rebuild...  So it's possible since the old code was archived, and we have the blockchain..

But then after that would require someone to rally all exchanges/multi pools.. create a new website, etc..

It will surely take some time.. and I'm not sure that it would all be worth it at this point due to the reputation damage to the coin.