I found a website you can visit that has a system that can convert a large variety of file types. I've used it for a couple of things so far, and it works great.
http://www.convertfiles.com/
Check it out some time, it could come in handy. If you scroll down the page, there's a huge list of different files it tells you it can convert.
Server-side (Online) file converter
Server-side (Online) file converter
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Re: Server-side (Online) file converter
Thanks Swaffy. I found a nice site at the bottom at that page