Well i would ask the parents where they put the CD's. Since there is only one way to do it and that is not totally legit. Even if you have a legit key.
The patch will be needed anyways but it wont solve your problem. The startup replacement wont work either. You need a NoCD patch in order to do it and those are not the most legit thing.
(Mods i just told him what he needed. I didnt link nor give any more info. If it still breaks the rules go ahead end edit the post and take it out)