Help in creating an multi-chunk .vpk for Portal 2 mod

Hi i want to compile an multi-chunk .vpk file for a portal 2 mod, however this functionality in the p2 .vpk compiler and his closest branch brother alien-swarm (and consequentially source multi-tools that i assumed that could be used to do that instead but… is broken too) is broken can someone give a light here on how to do it propelly i tried the solution in the VDC but is kinda confusing to me =P could someone give a little help? i’m kinda out of places to go…

anyone?