Found the problem. 2nd music is at $f000-feff, but...

1CBB  20 15 FD  JSR $FD15 <-

before loading they restore the irq vectors using the kernal rom, and this
routine overwrites memory at $fd30-fd50, corrupting the music.

I also faked the Sledgehammer on-screen text saying "  splash
issue 09 releases on 10.3.'92! " during decrunch of the mag, but still used
exomizer for packing,I'm too lazy to use native packers anymore ;)
