Editor Resource fbm questions?

Hi There
Iam having trouble with a asset I hope to submit. Firstly my test scene has a .fbm folder/file that was generated from importing an fbx with embedded media, but the package manager says they arnt allowed, so do I have to go through the scene and drag all the textures out of there into another folder or will fmb's be allowed in the future?

Also I have some editor classes that use bitmaps that should go in the Editor Default Resources folder, but I cant see how to do this automatically when everything to be in the package has to go inside a folder with the asset name on it. Does installing the package automatically detect an 'Editor Default Resources' file and move it to the correct folder?
Thank you
Mike