Portable Execution

First off let me say that I love the SQuirreL client.  It has been my
favorite database explorer for a long time now.  A lot of great work
has gone into this fine utility, and I am wondering how much effort
would be needed to turn it into a portable application capable of
running from entirely on a USB / CD drive.
Some things that would need to be modified when 'portable' mode is on:
* The application should not attempt to write or read from the user's
folders, only the install directory
* The location of the jdbc jars should be relative to the install directory
* Alternate batch/sh startup scripts should use a JRE installed to a
location relative to the install directory

Is this something that is easily achievable?

Thanks

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