How to set CLASSPATH with makePropertiesObject in WLST

In Weblogic 9.1 we are using Nodemanager to start the Admin Server in WLST using nmStart. We want to set some memory args for the Admin server and I was told by BEA that you'd use makePropertiesObject to this and pass this object to nmStart, that was fine. We also want to update the admin server classpath and were told makePropertiesObject could also be used for this.
I'm doing
arg = "Arguments=\" -client " + jvm_args + "\""
prps = makePropertiesObject (arg)
nmStart(targetserver, domain_home, props=prps)
where jvm_args ="-Xms256m -Xmx512m -XX:MaxPermSize=128m -Djava.class.path=..."
Also tried
jvm_args = "-Xms256m -Xmx512m -XX:MaxPermSize=128m -cp ......",
However, in both cases the Admin Server process is running with default "-Djava.class.path=...", plus a my "-cp myclasspath" or "-Djava.class.path=myclasspath", depending on which method I used. Am I doing something obviously wrong ? When the Admin Sever is started by NM using nmStart how would you set its classpath ? Should another command be used for starting the Admin Server instead ?

Hello,
http://edocs.bea.com/wls/docs91/server_start/nodemgr.html#1083353
This link lists the list of properties that can be specified to start.
Normally, for managed servers, the admin server collects the values for
these properties from various config mbeans and sends them to the
nodmanager. For starting the admin server itself, a properties object
can be created and the values explicitly populated with desired values
and passed to nmStart.
Classpath is one of the properties to send to the nodemanager while
requesting server start.
HTH,
-satya
BEA Blog:
http://dev2dev.bea.com/blog/sghattu/
Get Involved in CodeShare:
https://wls-console-extensions.projects.dev2dev.bea.com/
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