For Lite Touch deployments, we can now create multiple partitions, or even prepare multiple disks.
Note that this uses some interesting math, the same as System Center Configuration Manager. Looking at the example above, with the first partition specifying to use 50% of the free space and the second partition saying to use 100% of the free space, what would you expect the result to be? It will create two identical partitions, each one taking up half of the disk, since the free space calculation is based on the *remaining* free space.
For SMS 2003 we still use the original partitioning script at this point, mainly because there's no location to write a Diskpart script file. We are still looking at ways to do this.