Although I am not an expert regarding screen overwrites, here is what I used for VAxx transactions:
| Transaction Code | Program | Original Screen Number | New Screen Number | New Program | Screen Description | Screen Example given in OSS Note |
| VA01 | SAPMV45A | 4001 | 9099 | SAPMV999 | Overview - All Tabs except Sales | Not in note |
| VA01 | SAPMV45A | 4008 | 9099 | SAPMV999 | Overview - Sales Tab | Not in note |
| VA01 | SAPMV45A | 4002 | 8099 | SAPMV888 | Header Data - All Tabs except Conditions and Billing Plan | X00X |
| VA01 | SAPMV45A | 5002 | 8099 | SAPMV888 | Header Data - Conditions Tab | X00X |
| VA01 | SAPLV60F | 4001 | 8099 | SAPMV888 | Header Data - Billing Plan Tab? | X00X |
| VA01 | SAPMV45A | 4003 | 7099 | SAPMV777 | Item Data - All Tabs except Conditions | Y00Y |
| VA01 | SAPMV45A | 5003 | 7099 | SAPMV777 | Item Data - Conditions Tab | Y00Y |
| VA02 | SAPMV45A | 4001 | 9099 | SAPMV999 | Overview - All Tabs except Sales | Not in note |
| VA02 | SAPMV45A | 4008 | 9099 | SAPMV999 | Overview - Sales Tab | Not in note |
| VA02 | SAPMV45A | 4002 | 8099 | SAPMV888 | Header Data - All Tabs except Conditions and Billing Plan | X00X |
| VA02 | SAPMV45A | 5002 | 8099 | SAPMV888 | Header Data - Conditions Tab | X00X |
| VA02 | SAPLV60F | 4001 | 8099 | SAPMV888 | Header Data - Billing Plan Tab? | X00X |
| VA02 | SAPMV45A | 4003 | 7099 | SAPMV777 | Item Data - All Tabs except Conditions | Y00Y |
| VA02 | SAPMV45A | 5003 | 7099 | SAPMV777 | Item Data - Conditions Tab | Y00Y |
| VA03 | SAPMV45A | 4001 | 9099 | SAPMV999 | Overview - All Tabs except Sales | Not in note |
| VA03 | SAPMV45A | 4008 | 9099 | SAPMV999 | Overview - Sales Tab | Not in note |
| VA03 | SAPMV45A | 4002 | 8099 | SAPMV888 | Header Data - All Tabs except Conditions and Billing Plan | X00X |
| VA03 | SAPMV45A | 5002 | 8099 | SAPMV888 | Header Data - Conditions Tab | X00X |
| VA03 | SAPLV60F | 4001 | 8099 | SAPMV888 | Header Data - Billing Plan Tab? | X00X |
| VA03 | SAPMV45A | 4003 | 7099 | SAPMV777 | Item Data - All Tabs except Conditions | Y00Y |
| VA03 | SAPMV45A | 5003 | 7099 | SAPMV777 | Item Data - Conditions Tab | Y00Y |
In my naming scheme:
9 = Overview
8 = Header Data
7 = Item Data
I may have over anlalyzed this and just used the names in the Note. But I believe you are correct, they can be anything as long as they are unique. Just be aware that once you create a flavor for VAxx, any changes to the overwrite names will "break" your flavor.
Important note: I had to add two rows to properly handle the Overview screen tabs that were not addressed in the OSS Note. See my note in column 6 of the table above. I commented on this in Chinthan's blog but still no response: SAP Screen Personas 2.0 Screen Id and Control Id overwrite rules
In the table above, the Screen Description column is my note on what tabs I believe the screens are associated with.
Regarding your question about program SAPLV60F, screen 4001 - I believe this is a screen from the header data, not the item data.
Rob