ENHANCEMENT-POINT in reprot RM06EPS0

HI ALL,

I want to change report 'RM06EPS0' that is price comparson list, i think of copying this into a z report and then make changes. But when i open the source code it contains statements like this.

[code]ENHANCEMENT-POINT RM06EPS0_G4 SPOTS ES_RM06EPS0 STATIC.

$$-Start: RM06EPS0_G4----

$$

ENHANCEMENT 4 MGV_GENERATED_RM06EPS0. "active version

INITIALIZATION.

DATA: mgv_matnr_prog LIKE rsvar-report,

mgv_matnr_selopt_tab like rsldbdfs occurs 0 with header line.

FIELD-SYMBOLS <mgv_matnr_selopt_conv> TYPE STANDARD TABLE.

ENDENHANCEMENT.[/code]

What are these ENHANCEMENT statement, can we use it to put our logic in standard report if yes when HOW ?

Thanks,