Make sources point to FCL as in PDK_3.0.g. Remove tools/homescreentools as not used. Point imgeditor and videoeditor to default branch instead of RCL_3 as the latter doesn't exist/is not used

source,dst,type,pattern,sysdef
http://developer.symbian.org/oss/MCL/sf/app/webuis/,/sf/app/webuis,branch,RCL_3,layers.sysdef.xml