I do not know what you mean by "unbound".
To create a Crystal report from a MS Access database, click on the new report icon, database, find database and browse to your .mdb file. The dialog box should return a list of table names within your .mdb file. From there pick your fields, sorting, grouping, etc. and you have a report.
If you have anything more specific please let me know.
PS-If you are new pick up George Pecks book - CR V8.5 The Complete Reference. I don't get paid for saying this, I just like his book. Software Support for Sage Mas90, Macola, Crystal Reports, Goldmine and MS Office