Read hard drive formatted in 10.8 in 10.6 (or Win7)?

Hello,
I have recently downgraded my Macbook Pro from Mountain Lion to Snow Leopard. I'm very happy with the change, my only issue is with external hard drive. It's formatted in the new format and 10.6 cannot read.
Is there any way to read Mountain Lion formatted hard drive either in 10.6 or under PC with Win 7 (I'm willing to pay for some 3rd party app if price is reasonable)? I have like 100 GB of data on that drive I want to copy, but I'm not looking forward to doing it the hard way (reinstall Lion, copy data elsewhere, downgrade again....).
Thanks for any advice.

The question really is one about which format the disk is actually using. That might provide a clue.
Open /Applications/Utilities/Disk Utility and select the drive. The info pane at the bottom should indicate the drive format. It's been a while, but the only differences I can think of beetween 10.6 and 10.7 are ExFAT support (added in 10.6.5) and encrypted volumes.
Either that, or just find a friend (or local Apple Store Genius) who has a 10.7 system you can attach the drive to temporarily.

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http://support.apple.com/kb/HT5446
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Press the Power button again. After you hear the startup chime, press and hold Command-Option-R to start up to the Internet version of Mountain Lion Recovery.
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