I contract to many designers and want to use my toolbox parts and save them to the same folder as the assemblies.

the intent is for all assemblies to to be stand alone with no external references to toolbox libraries

In past releases I was creating new parts to the copied folder then opening and doing a save as to the assembly directory

this isn't working in 2012. the toolbox parts keep linking back to the copied folder after reopening an assembly

Whats the best approach to acheive this in 2012.