I doubt it would be that difficult to put a licensed floyd into the ibanez...
but, what I don't understand is, why sell the ibanez for the ESP? I mean, I like esp's, but I aslo like ibanez's. and I'm wondering why? what is better about the ESP that is better then the ibanez? does it sound better? have you even tried one?
I would try one before I go selling the ibanez though, because, what if it turns out that the ESP doesn't sound as good as the ibanez, and you decide to change your mind... well.. too late then!