using sql server compact 3.5 on mobile

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SQL-CE

C#

SQL-Server

Mobile

i making mobile application for my gradution project and i need to develop DB contain some data to fill comboxs in mobile application ...
i hear sql compact edition is the solution but i have some question :

1- when i make the database VS ask me if i want data source My comuter or active sync ...( what is this ) hint i want to develop the db in my pc and attach it to mobile application

2- how can i change the connection string :
sqlceconnection con= new sqlceconnection("the path to db in my computer");
how can i make this path to mobile device

3- what is the requirement should be in mobile e.g (. net framework and ...... )

4- howw can i attach the db to project to run in with the cab file .....

:) and first of all thx for read my question