need help with sims 3 late night

So I have the original cd of the sims 3 I installed from this site seasons, pets and generations. I downloaded the sims 3 late night and it came with a very long guide of how to install late night and make it work and for that I need to install and crack a lot of extensions and stuffs that I don't want . So my question is : do I have to do what the file telling me to do to make it work or I can just install it normal like I installed the other extensions that I already have ?
P.s sorry for my English . And thanks for helping

Hello,

No need to follow those instructions! It's no longer needed. You can just run setup, grab a cd key from the guide, and ignore the rest.
It may be a good idea to run the patch and the crack from the fix again after installing Late Night.