How to access files from Windows from an ext4 disk?

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http://forums.opensuse.org – I am fairly new to Linux and have recently installed OpenSUSE 11.2 x64 KDE. It is a pretty nice OS, all things considered. I am still learning. Currently, I am dual booting OpenSUSE and Windows 7 Pro x64. Each OS is installed on a separate 1Tb hard drive. One question that I have tried to Google for a solution with no success is, how do you access ext4 from Windows? Shortly after I installed OpenSUSE, my OpenSUSE hard drive "vanished" from Windows 7. Naturally, I can access all my hard drives from OpenSUSE, which does support the NTFS. I am quite sure that I am not the only person who has this problem as I know that dual booting Linux and Windows is quite common. Thanks in advance. (Distributions)