Applications :: Microsoft Fonts On Snow Leopard?

I did a search and I found soem sort of compatibility pack by Microsoft for Office 2004 that includes fonts like Calibri. My problem is I don't use Office, I use NeoOffice. I tried taking the Calibri font from my Windows 7 machine and dumping it into the fonts directory on the Macbook, but it doesn't look right Is there a special font pack I should download? Here is what it looks like - Calibri on the left, Arial on the right. I could use Arial, but in my next class I'm going to do alot of group work, and if I work on a file in Calibiri, and send it to everyone else in Arial they might get annoyed. Or if the formatting is changed due to changing a font I'll look like a dope ruining everything with his Mac.