Using object libraries from duplicated airports

Hi. After the new scenery loading method introduced with SU10 the custom airport addons can´t be overwritten, even when using Content.xml with the package reorder tool so both are loaded anyway despite their priority resulting in objects being overlapping and terrain elevations being not consistent.

The only solution appears to be uninstalling one of the airports (typically the default airport) in case you have duplicated addons. However uninstalling the default airports also removes their custom objects libraries. I´m using those custom objects in other airport addons I created, so if I uninstall the default airports I will also lose their custom objects I need. Is there a way to load those custom objects without using the airport itself?