it is good idea to take 1 of those ships in Custodian. one thing u will need in extended Crossfire-SP-campaign is money, much money to pay for the best equipment. (some of this equipment u will already find in in Vanilla-SP-part!) to get enough money u should hunt NPC-s between the SP-missions and sell their pods in prisons. of course u can take other (Vanilla-)ships. but more firepower means simply faster money and in extended Crossfire-campaign u will find enemies, they are much stronger than…