About the JCO's configuration...
I have two questions:
1) What the usage of "Extented Configuration Management (XCM)".
2) What the usage of JCO configuration in Web Dynpro or SLD?
If you need to configure some setting for an XCM application, that is normally handled by CRM-ISA,
so you may be in the wrong forum.
However, if you need to modify some jco parameter, that can be done using the webdynpro
I attach you documentations which describes how to use the
How to use WD Content Administrator
WD Best Practices How to configure JCO