Need help with Old game! Sims 2 Bon Voyage! Please!

I have been searching Google high and low for a solution to my problem. Low and behold, this link http://www.gamespot.com/forums/pc-mac-linux-society-1000004/install-problem-27114688/ will take you to my exact problem. The .iso file is the exact same.

But the link to the (maybe) solution is down? Their are very few responses and I'm just at a total loss. All of my games are real hard copies with disks, codes, booklets and cases. Not downloaded ones. So why is Bon Voyage disk 1 just an .iso file? What IS this .iso file? It only gives me a burn option. Doesn't load. At all.

Does anyone anywhere have a viable solution?

Havent really touched sims 2 in awhile wife an i play sims 4 with expansion pack..Awhile back origins offered every pack for free of sims2..So my wife jumped on that an she hasnt had a problem..When she feels like playing winter an animals

I still own/play every Sims game. 1-4. But I'm really bothered that this ONE expansion isn't working. If I can't find a solution, I guess I'll have to break down and buy another copy..