Simple Reporting GUI

Hi,

I want to create a simple reporting GUI that would allow users to generate reports in crystal reports without having to directly deal with the crystal reports software. The GUI would allow the user to:
1) select the datasource location
2) select the type of report (The report 'types' would be based on report that were pre-created in crystal reports)
3) click a button to generate the report and display it as a pdf.

Essentially the user is simply selecting the location of the datasource and the reports are being 'generated' by simply using the user selected datasource as the datasource for the pre-created reports.

Can this be done? If so, would it be very difficult to create something like this