add more data to pilot (csg) conversion error messages

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9732 387891d4-d844-0410-90c0-e4c51a9137d3
add some red alert doco

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9733 387891d4-d844-0410-90c0-e4c51a9137d3