multi stronghold ! help me

hi guys ; i'm playing BG2EE ; my character's class is thieft/fighter . about stronghold ; i do fighter quest first but keep Nalia waiting at the gate of her castle ; then i finish theft quest and take theft's stronghold ;then i'm back Nalia's castle , refuse her offer to take her in party again . After that ;I do some other quest ; then i read about some mod can help us keep all stronghold . So ; is there a way for me to take that fighter's stronghold with current save ? I don't want load old save or begin everything again . The trouble here is "I had refused Nalia's offer " ; if i don't , maybe it will be less complicate . Help me guys ; any methods , cheats or mod ? thx for reading all of this