Framiga : 1st, let´s say that desoldering is the easiest problem to fix. That will probably take less than a minute without damaging anything at all :-)
2nd, a CSPPC card already has got a 604 PPC so what is the difference with the 604 that the Mac uses

:-?
3rd, sorry for my limited technical knowledge, but what is a BGA cpu ?? Has it got a different size than the one in the MK3

:-?