Automatic subdomain creation PLUS more...

[ephigenie]

Right after you copied the data.
Just create a new db based on the subdomain name and then fill it with content from a dummy db maybe with importing a sql file into your newly created db like on a shell :

mysql --password=<newpass> -u <subuser> -p -U <newdb> < dummy-cms.sql

after it :
mysql --password=<newpass> -u <subuser> -p -U <newdb> -e "update users set password = crypt('newpassword');"
Or write it directly in perl this depends on your knowledge.
Have a look at the ispcp-setup or the upgrade script to find out how to do it in perl.