Duplicate file format

I am creating a program that needs to display to the requestor ALL the User 
Profile names on the system. (sub-file techniques)
The requestor then chooses which profile (s) that need to be analyzed.
I am using the command DSPUSRPRF USRPRF(*ALL) OUTPUT(*OUTFILE) 
OUTFILE(QTEMP/filename). This will create a file using the format 
QSYS/QADSPUPB. This will be input to the RPG program. 
My F-spec for this file will be 
FQADSPUPB  UF   E           K DISK 
The output file for the chosen User Profiles needs to be in the same format.
The Question is:- how do I code my RPG program so that my output file uses the 
same format QADSPUPB (NOTE - I know about PREFIX, but I cannot (or can I) use 
the same file name (QADSPUPB). 

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