The first IVP job to run is an assemble and link job for one of the sample exits. You can use this exit to examine and modify a before or after image before it is applied to the VSAM data set.
//CICSRS3 JOB (999,POK),'CICS VR 4.3',CLASS=A,MSGLEVEL=(1,1),
// MSGCLASS=T,NOTIFY=&SYSUID,REGION=0M
//SETPARM SET HLQ=DWW.V430
//REXXCRE EXEC PGM=IEBGENER
//SYSPRINT DD SYSOUT=*
//SYSUT1 DD *
//
SAVE OPERATION SUMMARY:
MEMBER NAME DWWPREEX
LOAD LIBRARY DWW.V430.DWWEXLD
PROGRAM TYPE LOAD MODULE
VOLUME SERIAL TSTO21
MAX BLOCK 32760
DISPOSITION REPLACED
TIME OF SAVE 03.33.34 MAY 23, 2008