Uh, I do admit to not being sure of what specific questions you're asking.
Are you looking to stream media or are you looking to post media for people to download?
Is your current host using a specialized server running a Windows Media server (and this would be a Windows Server server, not a standard linux web server running apache)? If not, you can continue to do the same thing you're doing now and just host the wma/wmv file for progressive download.
Everyone I know installs quicktime, but I suspect that's because I'm in the US. I dunno what it's adoption rate is overseas.
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