Mandriva live distributions are not currently speed optimized, this includes Mandriva Move, the 2006.0 live CDs, and even the latest Mandriva One.
Some other live distributions, such as Knoppix or recently Accelerated Knoppix, have efficient speed optimizations techniques.
Knoppix sorts files according to their access time in the compressed image, so that the CD drive doesn't move too much back and forth. See this discussion on Knoppix ML.
Accelerated Knoppix uses more advanced tools to optimize the block order in the compressed cloop image, using a block access profiler.
A similar effort has been made for Damn Small Linux. qemu is used to trace block access on the CD medium, and then a script is used to find the matching files. See this thread in DSL forums.
When enough memory is available, readahead is an interesting option. It makes the CD drive reads more consecutive data than it needs, to keep some in cache benifiting the drive speed. An interesting thread on Knoppix forums.
An interesting pointer about CD drive speed and cache
Other live distributions:
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