If you have a CPL already then the IR course is reduced to 50 hours minimum, split between FNPT and aircraft. Your probably looking at 30 - 35 hours sim time and the rest in the aircraft. Different FTO's may tweak that a little either way depending on how you progress. Assuming you finish the 50 hours training and are ready for test, you will have to do the 170A test first, before actual skills test.