Feisty is supported till October this year.
For downgrading open office maybe you could look at something like this:
http://wiki.services.openoffice.org/wiki/Run_OOo_versions_parallel
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Feisty is supported till October this year.
For downgrading open office maybe you could look at something like this:
http://wiki.services.openoffice.org/wiki/Run_OOo_versions_parallel