RPG to ACTA Conversions (stats)

Is there some way to convert the ship stats and rules from the RPG across to ACTA? I have scratch built a PSI Corps mothership and wouldn´t mind doing a few more to have a "fun fleet" of the sneaky little beggars, along with their baby carriers, Black Omega squadrons, etc. There are stats for the Mothership in the Psi Corps book but I was wondering how (or if?) those translate across into ACTA?
Or should I simply make up the stats based on the description and playtest is for balance?
There is no official method that I know of, take a Civilian Liner as a basis and add weapons and a maybe better engines and such for a start.