From: kevan on
For Community Edition, you should be able to specify the java executable as an option to the installer. See http://publib.boulder.ibm.com/wasce/V2.1.1/en/setup-reference.html#Setupreference-Installanduninstallwizardcommandlinesyntax

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frmsrcurl: http://compgroups.net/comp.databases.ibm-db2/Installing-IBM-Data-Studio-V2.2-and-Websphere-Community-edition-on-windoz