If each module had an installer script ( ie unzip to temp dir, copy to nuke tree, make adjustements, build tables, change permissions, select options ) then these could be put into a master script to install all modules in one command.
I beleive it would be easier to have everything install and then disable the modules through admin that you do not use.
Add this idea to a mysqldump of all the databases ( ie post-nuke, Cart, forums etc ) and you would have a complete upgrade solution.
1) Dump DBs
2) Install post-nuke .64
3) Bulk install modules
4) Restore DBs
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