Yes, I am answering my own question
1) Followed HowToForge here
to perform the Etch to Lenny Upgrade.
2) Works very well.
3) I did however receive this at boot:
Short name (NAME) undefined in /etc/default/sasl/authd, using default (warning).
4) The Fix is detailed here
5) Note that you may also receive
Starting : defaultNo run directory defined for default, not starting failed!
This is also detailed in the same fix
Everything appears smooth so far, ISPConfig2, Drupal, Multisite. I will run the Upgrade utility in Drupal as well.
Now it's on to try mod_gnutls for this name-based SSL ... something tells me that won't be so simple.
PS, I am running this in a Virtual Machine