[Radiant] Upgrade to Mental? Need 'how to'

[Anton Aylward]

How can I upgrade an existing site to Mental?

I've tried copying the database from a working and successful 0.5.2 site to
a svn export of Mental and running 'rake db:migrate'

But when I access the site
   a) The Markdown and Textile isn't rendered
   b) I get some SQL errors:

HELP!!

-- 
In preparing for battle I have always found that plans are useless, but
planning is indispensable.
    Dwight D. Eisenhower