i successfully migrated my 6.1 brain into the 6.2 brain, by following the instructions provided during the 6.2 install.
i first made a backup of my 6.1 brain (database and script)
then i uninstalled 6.1
note: uninstalling Hal 6.1 does not remove any custom files from the Ultra Hal directory.
then i put my backed up copy of my 6.1 brain into the UltraHal main directory (which still remained after uninstalling 6.1)
then i renamed my backup brain files: HalBrain.db and Hal6.uhp respectivly. (like the default brain file names)
then i installed 6.2 and during the install it asked me if i want to "merge" (or some word like that) my 6.1 brain with the new 6.2 brain. ....i sez YES and it let me merge them...and it worked great.
i was then (after the install) left with a 6.2 default brain, a 6.2 enhanced brain (my 6.1 and new 6.2 merged), and a copy of my original 6.1 brain, which was called hal6old or something like that.
NOTE: the custom brain files that you want to merge have to be in the Ultra Hal main folder, and named HalBrain.db and Hal6.uhp - for the "merge" to work.
the only problem is that it only merges the default brain file names with 6.2 brain files. thus you can only merge 1 brain during install.
(please correct me if i am wrong about that)
hope that helps some
-the dude