Istore codes are mainly JSP changes. Below is the steps need to follow to customize and migrate the iStore changes.
Find the file from $OA_HTML
cp $OA_HTML/ ibeCScdDirectEntry.jsp /home/Sandeep
rename the file with “xx” (xxibeCScdDirectEntry.jsp)
cp /home/sandeep/xxibeCScdDirectEntry.jsp $OA_HTML/
Navigate to FND_TOP and compile the JSP in that environment
cd $FND_TOP/patch/115/bin/
perl ojspCompile.pl --compile -s xxibeCScdDirectEntry.jsp
Bounce Apache
$ADMIN_SCRIPTS_HOME/adoacorectl.sh stopall
$ADMIN_SCRIPTS_HOME/adoacorectl.sh startall