Hi, welcome to the forums.
Don’t expect any information on cracked/hacked or otherwise illegal versions of software on here. We do NOT condone any kind of illegal business regarding tracks or software.
As for the best key detection program, I think the only answer can be Mixed In Key. It’s not free, actually a serious buy. But then again, it will lost for a lot more than the few CDs you can’t buy if you buy MiK.
I do believe it comes with a no questions asked money-back guarantee. So if you really don’t like it you can always hand it back in for a refund.
As for specifics on mixing Psytrance (and there are even sub-genres of it?) I can’t help your there.