I'm looking for a simple but good way to upmix stereo to 5.1 (stereo wave file to 6 mono wave files). I wanted to try "surroundboy's" method (from doom9 forum) but some pics with settings are missing. I also tried a plugin for nuendo but I think it's to complicated and there are to many options. I also found this method:

Import stereo wav in Adobe Audition,Multitrack layout,wiev Multichannel Encoder,on the right side there is track options,I choose surround panner,stereo source,adjust sub channel level to 50,center channel 100,track level 100.Export options:Export as 6 individual mono wave files.After that import just the LFE in Sound Forge & apply resonant filter @ 65 Hz,Resonance 2.0,Wet/Dry 100%,Apply filter settings & export as 48000,32 Bit mono.The LFE now is set all I need now is surround "effect".
Import the LeftSurround & RightSurround in Sound Forge apply "AnalogX Vocal Remover" & export them again to the same dir where I have the other files.Now I have 6 mono wave files ready for encoding AC3,DTS.

Is this any good?
My 5.1 set uses dolby pro logic II to convert stereo to surround, is there a software version for this?