There were no versions of Alice between Alice99 and Alice 2.0. There were many beta releases of 2.0, but these mostly accounted for bug fixes, not really major changes.
Scripting was dropped in 2.0. It can be enabled again, but you will have to go through the source code and modify it yourself.
Alice is open source and the source code can be downloaded by scrolling to the bottom of the Alice download page:
http://www.alice.org/downloads/authoringtool/
We do not provide support for source code modification, as we are a very small group and have our hands tied in upcoming projects.
FYI, Alice 2.0 is no longer in beta, so we have dropped the 'b' from the title.
Good luck!