go into st_equip.ini using BiniQDU and find the shield you want to edit the line of the shield under hp_type = hp_fighter_shield_special_10 for example, edit the last number to the shield level u want. u can find a list of shields on the stickies

hmm thats what i done, but my problem is, we addet the advanced champion freighter shild for the Battleships and now, every single ship can mount it, even a starflier. I changed the 10 to 15 but its still available and can still be mounted, dunno if i messed up the files somehow, but before i delete them from the market misc and make them as a addon for a BS i want to look if there is another way

Some one said that VOLUME statement can be added to keep small ship from mounting euqipment which normally has volume zero. Make it 500 and battleship cargo hold 500; only the battle ship would have room to mount it? I only guess. It may only work for goods; but I seen an engine/poerplant mod that used volume to stop mounting big stuff on small ships.