In the and there are many Topic about problems to get a valid license for the Sneak Preview SAP NetWeaver 04 ABAP Edition. Here are the steps to get it:
If you can't login as user BCUSER to your Mini SAP System then you can also try to install the License on the Windows Command Line. You have to logon as User NSPADM to your Computer and run this command:
C:usrsapNSPSYSexe
unSLICENSE -install