LaserDisc Dolby Surround Question

Hello,

I need some help identifying the type of audio on a LaserDisc set. As some of you may be aware I am working on a preservation of this set: http://www.lddb.com/laserdisc/35598/168035/Star-Wars:-Coffret-Trilogie Now according to the lddb page it says this set has "Digital Sound" and carries a "Dolby Surround" soundtrack. I am capturing these LaserDiscs with a Pioneer CLD-D925 and Canopus ADVC-55 using the RCA jacks on the D925.

The problem I am having is that I am not sure I have captured the audio properly. I have been looking around the web to find out what the speaker arrangement icon next to the "Dolby Surround" logo on the lddb page means and I finally came upon this webpage: http://www.aracnet.com/~nwolff/theater/surround.html according to this page this set could have 1 of 3 types of audio

1. Dolby Surround
2. Dolby 4.0
3. Dolby Pro Logic

At present I have only captured 2 channels of audio for the whole set. Now its my understanding that this would be correct for Dolby Surround which is 4 channels matrixed down to 2. If this is the case can anyone suggest how I un-matrix the 2 channels into 4 or how I could encode my 2 channel PCM captures as Dolby Digital Surround? However if the audio is not Dolby Surround but in fact Dolby 4.0 does this mean I am missing 2 channels of audio? If this is the case it shouldn't be a massive problem as I have noticed in the past that the capture settings on my system have an option to capture "First 2 channels" or "Second 2 Channels".

I am completely stumped, please help!

Don't pay much attention to the speaker arrangement icons - they can be confusing.

You have captured 2-channel Dolby Surround audio. If you are encoding to Dolby Digital (AC3) for DVD, your audio should ideally encoded as 2.0 with the Dolby Surround flag set.   

Thats exactly the kind of answer I needed! Thanks Moth3r :D