Manually editing Mondrian schema in Pentaho CE 5.0

Hi

I am trying to find a decent and simple way to edit my schemas manually, like I did it in 4.x (edit schema file and flush mondrian cache). Now the schemas are stored in JCR so I have to export it, edit it, and then import it back by adding a new datasource!? I suppose there is some more simple way to do this (by not using schema designer if possible)?

Thanks very much for any information :-)

regards, dejan