Today I have severals Zimbra 5.0.2 Open Source Edition installed on Ubuntu 6.06 working fine.

But all my hardware are 64bits capable, from now I want to finally migrate from 32bits arch to 64bits. How is the procedure for this job?

I'm thinking here, maybe I need to update my Zimbra 5.0.2 to 5.0.4 on 32bits and after that, do a fresh install on other machine with Ubuntu 6.06 64bits and Zimbra 5.0.4 64bits. And only after I have the same versions on both archs, I will can do this... But sounds very difficult to perform two updates at once.

Can I migrate from Ubuntu 6.06 32bits + Zimbra 5.0.2 directly into Ubuntu 6.06 64bits + Zimbra 5.0.4?

Maybe I must wait to migrate from Ubuntu 6.06 32bits to Ubuntu 8.04 64bits with new Zimbra in the near future?! Will this be possible?

Will be there a procedure on Wiki, or even here in the forum?

Best regards,