Changing the spfile on 9.2.0.3

Hello Folks  

I am trying to "update"/"change" the spfile with the edited init.ora file under pfile in admin.  

I start the database startup mount;

Then use the

  CREATE SPFILE FROM PFILE='PATH\TO\INIT\PFILE\INIT.ORA'; But Oracle complains that the spfile is already in use.  

Must I use a different name ie change the name of spfile? OR can I update/alter spfile?

OR is there something with the method?  

TIA Denham

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