Hi
I think maybe the simplest way to start is to put it back up as a version 4.5. you have already the aolserver config file and either the database or a dump of it (latter case, just restore it), start it up and then fix any problems that come up.
As far as styling, the web designer needs to be made aware of the templating system and some additional tags available for the purpose of taking data from data sources and rendering it.
For the tags, look at http://your.server/doc/acs-templating
and look at the designer guide.
If you wish to upgrade to the latest version of openacs, I would do this -far- away from the production server, maybe on a machine at home. You could either:
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copy the old 4.5 site to a separate machine, then upgrade package-by-package, or
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atart with a 5.7 plain, bare openacs and move your packages and customizations across.
Last time I did something like this, I used the second method.
