I need a guide or help for mod MeshAnimation, i wanna add the "new" social actions to old Chronicles.

You can find everything here, as soon as you have donated to get the tool necessary to make .ukx animations working for Lineage 2: http://www.gildor.org/smf/

 

Because unlike utx, you can't make ukx with unrealeditor that work for L2 (it'll give skeletalmissize error or something)