(searched)Surround sound on standard def movies

So i ordered my Apple Tv about a week ago an should be getting it today or tomorrow. I noticed something while i was browsing the apple website though, I saw that it said "...or buy the HD version for an extra $ and experience 5.1..." So i did a search but all the threads on this were from january time frame.

So is this the case? can i not watch standard movies with 5.1 surround sound? I ordered this because i was tired of watching all my iTunes purchased movies on my tv (through my macbook) using my bose computer speakers, when i have a 5.1 channel bose surround sound on my HD TV.

Please clear this up for me, thanks.

P.S. can i rip regular movies onto my ATV and have 5.1?

Cave Man said:

They are in two-channel, which may (or may not) be in Dolby Pro Logic (up to 5 channel surround).

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what do you mean by that?

the thread you provided is the thread that i read into. Thanks for your help.