extend boot partition after adding HD to RAID array

W2K3 SP2

Prior configuration was 136GB basic partition with 2 HD in RAID-1.

Added a third 136GB HD and successfully converted to RAID-5, with 136GB

unallocated space.

My understanding is that the unallocated space can't be used to extend the

boot partition, and that the space should just be formatted as a basic disk

and used for data.

Is this correct?

Thanks,

dpl