Hi! I would highly recommend that you join our discord as it is far more active than these forums. With that being said, I can't think of anything particularly notable. You should be able to do sewer skip with your version. You will probably have poor load times. I would also highly recommend softmodding as it opens up many different possibilities in regards to JSRF, such as the IGT mod, the practice tool and many other cool things. You can also check out JSRFSpeedruns.com which contains lots of info.