Uhh in Homeworld 1, salvage everything, and I also recommend on the Kadesh mission you salvage everything there, don't kill the Multibeam frigates (trust me they are EXCELLENT) and try to scavenge Swarmers (Advanced ones preferable), and at least 1 Fuel Pod. To salvage the Swarmers kill the Fuel Pods so that they can't refuel when they run out. Send in the salvage corvettes and when they are close, the Swarmers will either dodge, or self-destruct, both which are bad. So, kamikaze the Salvage to give it the extra grabbing boost but when it almost hits press pause (this takes a LOT of skill), and tell it to salvage. When it comes back with new fighters these are good for attacking runs which will help later :P Also, try to salvage the Missle Corvettes from the Turanics. Their ability to fire missles indefinatley is a must (use the same method).