database path

[C# Programming]

Hi,
On my local machine, I have developed a c# application which reads from a sql server express database.
Now I want to install these (The application and the sql server express) on the client machine.
On the client machine, with the login I have, I can only have access to the U drive.
Questions:
1- Can I install the appplication on the U drive or does it have to be the C drive?
2- I also have to install the sql server express on the client machine. Can It be installed in the U drive?
3- The application has a config file which is used to access the sql server i.e. ./sqlexpress, etc...
What should the config file path be if both the application and the sql server express are installed in the U drive?

Thank you