Help needed - config p5 database

I’ve installed P5 as stand-alone. and by default it installed MSDE (Microsoft SQL server desktop engine)and config the database automatically.

the problem is it store the database on C: driver, and now i want to create a new database on E: driver, so i run database wizard and follow the wizard,

1 select - micosoft SQL server or MSDE
2 for application database selected - Project management database(PMDB)
3 for intallation method selected - create database and load application data

then the wizard ask me for "System Admin Name", "system admin password" and "Server Name"

I have never entered these in the previous installation and have searched the install manual, but can not find the default value?

I’ve tried "SA", but it does not work?

who can help me!