I translated this great script to Persian (Farsi) and I also customized the default skin and made it RTL. I also changed default font to Tahoma. Hope every one can use it.
I splited the template to three files. Start extracting from "skin_trellis_desk_default__rtl_td.zip" and when it asked for next file select "skin_trellis_desk_default__rtl_td.01.zip" and then "skin_trellis_desk_default__rtl_td.02.zip". Using winrar, winzip or 7z.