Database in Crystal Reports - urgent please

I am building a simple vb.net application and i am using (newbie) crystal reports to generate some reports.

Now, the problem is, it takes the path of database, but if i change the computer (like try to install my application somewhere else), it doesn't work, and i always have to open the form and cahnge the location manually.

In my vb.net i am using app.config to get the location and credentails for the database i am using (in db class, kind of db layer).

Can i do the same with crystal reports, somehow??

Or
is there a way i can make it so, that the crystal reports register the new location for the database automatically??

Please help

Please somebody......