Ok, I downlaoded Microsft word 2008 for mac and I coulden't open it for some reason and this Mac is brand new and I thought to my self maybe I need winRAR to open it because I remembered I needed it for my PC
also evreytime I load the winRAR program it dosent do anything but make a lot of those hard drives on my desktop

What should I do to open it?
and do I need winrar?
i opened the hardrive and this window poped up and i saw the "rar expander" i clicked it and this thing called "rar expander" and it says use expand in the file menu to expand an archive so i clicked on expand but i dont know what to do help plz

winRar has unzipped the files into a volume, those hard drives icons that u mentioned that it keeps making.

the installer and related files should be inside that hard drive icon. click into it and explore and you should be able to install MSword into your mac. If the contents in the hard drive icon are corrupted or not readable by mac, go download Stuffit Expander for mac, it's free and it's an un-rar program for mac since mac's existence. On a mac, some Rar files uncompress better with Stuffit, some better with winRar.

Zipped and rar files uncompress into a volume and is mounted as a hard drive image on the mac desktop, that's how it works. You've only unzipped it, and have not click on anything to effect the installation process yet. If you keep on unzipping it, it will just create duplicate images of the mounted drive on your mac.

hope this helps.