1) enUS and enGB work fine together it does not matter. Question closed
2) Well ofc you can't start another mysql server when you already have one running? Mabey try closing the original instance of mysql then starting this one. Question closed
3) I doubt this will work with SkyFire or anything currently so mabey just use this on it's own with no otehr mysql/worldserver/logonserver/website running. Question closed
4) HAving too many servers on one pc can mess up and confuse you so try as said before just using this one on it's own.
This is not just to that user this is to everyone to help get this working.
On anotehr note this looks far too confusing for me to bother downloading :P but nice work anyway OP.