Hi Mário,
Thanks to a project at ILO/ISSA, it's now possible to install the ]po[ packages on top of an existing OpenACS 5.3/5.4 system.
There may be "minor" problems with the SQL installation scripts. These issues may exist (I don't believe they exist at this moment...) because we don't test the "installation from scratch" every time we do a little SQl upgrade.
Please make sure you take V3.4.0.5 or higher from CVS.
Cheers!
Frank