To convert there is a conversion exam (was a single paper a few years ago) for CPL , then do the required ATPL subjects. Another reccom. is Advanced Flight Theory at Maroochy (did mine with them and very happy). They will also be able to give you the ins and outs of current conversion laws. Yellow pages or Google will find them. 750 hrs FW can be counted towards RW ATPL ie you will need 750 hrs RW. You will not have to do IREX again, probably a good thing-one less exam fee. Have fun. Although I now drive big planks for a living its nowhere near as much fun as fling wing.