One downside to this is that if knoppix is uncompressed it will be signicantly slower. It may seem odd to say that compression=faster, but a big bottleneck in the live cd model is the time it takes to read data from your cdrom. Compression actually helps aleviate this problem. Ever try Demo Linux? It was nice but one gripe I had about it was that it was much slower than knoppix. I think part of this was due to the fact that it is not compressed.