i have no issues playing phone files on my pc... i have super (they do not leave watermakrs) not the version i have anyhow..
but thats besides the point, i dont use super, i just double click...
you want to look into K-lite Codec pack! its great!
Download it here:
http://www.codecguide.com/about_kl.htm
Info on it here:
http://en.wikipedia.org/wiki/K-Lite_Codec_Pack
pj