help on unpacking

Hi. Im all new to this. I mean downloading big games that comes in more than one rar file. I just downloaded Wii sports resort, but now I got 3 rar folders that I dont know what to do about before I can burn the game and test if my softmodding works. They all seem alike to me, but I dont know if I need all 3 of them or just one.
Can someone please help me through this. Some kind of tutorial would be nice
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Answer #1
with the 3 rar files, get winrar or 7zip and extract them. You will need to download one of each part given in the topic then extract the first one and the rest will follow. You will get an ISO file after. Then get imgburn and burn said iso file to appropriate disc. Insert disc, test and play