I believe that normally, Hal will ask for the removal of the previous version.
In the past, however, I simply moved Hal (and reinstalled) into a different
folder (different name instead of the default).
There have been previous postings on merging brains but the latest brain
really combines the best of the best.
Like Will mentioned, the latest version of Hal really surpasses any of the previous
versions. (Gosh...imagine that!)
