Maybe I missed it somewhere along the way, but the evidence for Miguel being Crono so far appears to be:
1. They both have red(ish) hair
2. They are powerful warriors
Is that it?
Heck, we could say that Crono is really Connor MacLeod, because they are both powerful warriors and both use a katana (and both have seen events separated by hundreds of years), if that is all it takes to have a valid theory.
If you want to say that Miguel is really Crono is a fan fiction, go ahead. There is nothing wrong with that. But that doesn't mean it holds water.
Which part? Slapping MAYBE 20 of the same pics together...or using the prog that slaps them together to make the pic collage? >_>
Spending the time to even consider the action in the first place (the action either being slapping the pictures together, using a program to do it for you, programming such a program, considering to create such a program, or even considering to use suych a program).
Crono wasn't alone against Lavos.
But he could have been, as seen in New Game+