How to run jmap and jhat in Java 1.4

Hi All,
I need a histogram to analyse the heap memory details for the weblogic managed servers in a production environment. I was planing to use the *jmap -histo PID* command to analyse it. But my java process is running on v1.4.2.10. I have heard jmap is only available from JDK 1.5 onwards. I cannot upgrade the java version of the application.
Q1. Is there any way to get jmap for 1.4. If yes, can someone please provide a link?
Q2. This might be a little naive but is it possible that i install java 1.6 in another location in the system, run jmap and jhat in that and use the PID of the current JVM process which i want to dump?
Q3. Just another generic question - is the heap dump of jmap portable across all OS and Java verisions for analysis with jhat?
Thanks

Hi bshannon,
I had tried with the protocol names you given, but same is the result, can u tell me i m giving only protocol, host, user, password.
Is this sufficient to connect or i need to supply all the params like url , root, verbose, pattern, etc.
I m getting the access to server in other programs. Since our server doesn't support imap. so i tried like this
E:\downloads\javamail-1.4\demo>java folderlist -P pop3 -H email.abc.com -U username -P password
Exception in thread "main" javax.mail.NoSuchProviderException: Invalid protocol: null
        at javax.mail.Session.getProvider(Session.java:431)
        at javax.mail.Session.getStore(Session.java:530)
        at javax.mail.Session.getStore(Session.java:510)
        at javax.mail.Session.getStore(Session.java:496)
        at folderlist.main(folderlist.java:119)

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