Sims 1 Complete- Missing files?[SOLVED]

Hello, I'm very new to this and I hope I haven't had a silly mistake, but..

According to the instruction video:
I go to the setup folder, like it says in the beginning.
The ONLY files I have in there are:
-data1
-data1.hdr
-data2
And that's it. So I can't press "setup_english"

According to the installation guide that came with the download:
Step one was to open 'start.exe'
I only had a "Start", so I clicked that.
It took multiple times to open (I can't get it to open again, now.)
But when it finally did, I was able to click the language (English).
After that, when I pressed install, it wanted a CD.

I am so sorry if this has already been answered, but I really can't find it. :/

Thank you! I looked up the winRAR and it helped, and it is now downloaded. Thank you again! I didn't know to do that.. -.-