Sims 1 for Mac OSX 10.4.11?!?

I want to install the sims 1 to my mac. I have the cd but it's an expansion pack so I have to put in 2 cds. I have parallel desktop on my mac so how can i install it? I've tried to install it twice but whenever it gets to 95% it tell me to insert CD 2 and when I do a window pops up with a setup folder. Please guide me through the whole process. Thank You!!!! ;)