The script is fairly simple to make if you have DS 4.5 and the DSON importer.

(1) Bring up default Genesis figure.
(2) Go to surfaces tab and select all of Genesis.
(3) Change "UV Set" to "Victoria 4" or whichever you want.  Its usually first or last tab.
(4) Go to Content Library and save as "material preset" by hitting "+" on lower left
(5) Click tab for active pane options and choose "Create Poser Companion Files"
(6) select MC6 as choice under "Use this Library"
(7) MC6 for UV function will be placed in your default folder for PCF's

You need one script for each type of target UV. This will blow out the poser surface to blank, so a new shader must be applied.