Analyzing an Oracle dump
Use the SHOW=Y option for imp

From the manual at http://download.oracle.com/docs/cd/B19306_01/server.102/b14215/exp_imp.htm#sthref2498


  When SHOW=y, the contents of the export dump file are listed to the display and not imported. 
  The SQL statements contained in the export are displayed in the order in which Import will execute them.
  The SHOW parameter can be used only with the FULL=y, FROMUSER, TOUSER, or TABLES parameter.