Actually BlueScope you can, but you can't modify the database, but you can change the values of the stuff in the database with scripts (In this case the variable is $data_system.party_members). What I did is modify the initial party members with a script and then save the system data close the project reopen the project and got this effect in the database
http://img60.imageshack.us/img60/1898/lookyyy2.th.png[/IMG]
But It wouldn't let me change the fifth or sixth entry I can only delete them
I also created a script that modifies all skills and then saves them . I'm still running tests, because doing this could corrupt some files, but well it's a nice secret I stumbled upon. but I'm still questioning if doing something like this violates the license, its not editing the program itself but the original Data files (System, Skills, Items, etc) included with the project itself.
EDIT: after reading the license a few times it doesn't say anything about modifing the data files in the Data Folder...