Help Me Find A Free DRM Protection Removal Without Viruses Or Time Limits?

I Have Files I Downloaded From iMesh That Are DRM Protected.
I Want To Convert Them To MP3 Files So I Can't Put Them On My iPod.
Can You Give Me A Free Program To Download That Won't Give My New Computer Viruses?
Also, I Don't Want There To Be A "60 Sec. Conversion Limit".
I Want My Entire Songs Converted Free.
Thanks! :)