Assuming that the raid drives are a software raid and not a true hardware raid drive set (which is the normal way most people do raid, particularly with raid on a motherboard), you very likely are not going to read them with Knoppix. And I should also point out that raid 0 drastically increases your chance of a drive failure (a failure of either drive, or even the raid controller, will cause loss of data on both drives) and in most cases doesn't offer much of a speed improvement.

You best bet is to use Knoppix to recover the data on your main OS drive, either across a network to another system, or to a USB flash drive, or a FAT formatted (not NTFS) USB or firewire external drive, or even burning discs if you have multiple drives or enough memory to load Knoppix "toram" (rumored to not work with Knoppix 6.x). Then reinstall a Microsoft os to the drive (I would disconnect the raid drives during all of this just to be safe). Then finally reconnect the raid drives, install the windows driver for the raid array, and recover the raid disk with Windows.