Conditional Multicasting

Hi all,

We use nw65 and Zen 7Sp1.
A big thing we are missing (or cannot find) is the following :

We want to distribute images by multicast for large rollouts.
But the pc's are configured with a C and a D partition on 1 fysical
harddisk.
The result must be that the D partition isn't touched (stays intact) and
only the C partition is replaced.
With Unicast its possible, but that takes to long if you want to image
hundreds of pc's at once.

Collegues want to use altiris for that, there it seems to be possible.
Is there someone who knows a solution for this problem within zenworks(if
there is one).

Thanks in advance for any hint or advice

Kris