How to override a dsn that is contained in a proc called by another proc...?

//PROC1 PROC
//STEP1 EXEC PGM=IEFBR14
//DD1 DD DSN=XYZ, DISP=SHR
//SYSPRINT DD SYSOUT=*
//SYSIN DD DUMMY
// PEND

//JJJ JCLLIB ORDER=PROCLIB PATH
//PROC2 PROC
//STEP2 EXEC PROC1

//JOBNAME JOB PARAMETERS
//JJJ JCLLIB ORDER=PROCLIB PATH
//PROC3 PROC
//STEP2.DD1 DSN=NEW NAME,DISP=SHR

THIS IS D WAY....
THIS PROG. WILL DO NOTHING IT'S JUST AN EXAMPLE