upgrade to Sametime and Quickplace

[mpoweleit@xxxxxxxxxxxxxx]

We are getting ready to install Quickplace and sametime on our Iseries 
model 825. I saw the following IBM link:
http://www-1.ibm.com/servers/eserver/iseries/domino/domino6/releasesupport.pdf

One page 4 it shows Domino support for other lotus software. If I read 
this right, we would have to do the following to get Sametime and 
quickplace to run on our system:

1. Upgrade our Domino6.0.1  sever to 6.0.3 to support the latest version 
of Sametime 3.1
2. Install ( in another partition) an older version of Domino  5.0.12 in 
order to run Quickplace.


Is this true? We have no problem with step 1. Step 2 sounds like a 
backwards move as well as needing another Domino Server License. Is it in 
fact correct that a Domino 6.0.x Server and a  Domino 5.0.x server cannot 
exist in the same partition(LPAR) of the AS400?

Thanks
Mike