yes, get xs++ and a K750 MAIN and FS

XS++ can be found anywhere.

you can find the needed firmwares here: Downloads - K750 - Top Sony Forums but since you are a new member you will have to pay for the files (cheapest = 2 euro for 5 days) more info here: Request access to Download Area - Top Sony Forums

flashing tutorial here: XS++ 2.x Guide - Top Sony Forums

good luck