New tool was posted today in Tools section on videohelp.com website. It is called:
PS3 Media Server: http://www.videohelp.com/tools/PS3_Media_Server
It is free, does not require any installation, just double click .exe file.
I tried it. It works great, and cannot be easier than that.
I am running PS3 Media Server on two PCs and PS3 can see both.
Kudos to author