PS2 How can I using the ROM DVD Player after installed Mechapwn?

I'm sorry to disturb you.
Well, I know the most convenient approach to restore DVD playback function is installing the DVD Player Modification (It is running well), but I'm hardly get used to the mis-matched control logic (Circle for cancel rather than confirm). So I start this thread and ask for your help.

Can I re-sign the kelf of ROM DVDELF so that I can use it as a DVD Update by some tools/methods?
Or, if it is possible to reverse the control of Circle and Cross in the DVD Player Modification?
Is there any other method to update the DVD Player?

More information:
The PS2 model is SCPH-50009, no modchip installed.
The stock DVD Player version is 3.02C.
After mechapwn installed, the console report itself as DTL-H50009.

Have tried: Decrypted and encrypted the stock DVDELF via kelftool and replaced the dvdplayer.elf of DVD Player Modification, and copied the whole BCEXEC-DVDPLAYER to memory card where FMCB installed. Also tried using kelfTwinSigner with osdmain of FMCB. To both cases, the DVD Player failed to start up with an error: "DVD 播放器未设定,无法启动。(DVD Player was not setup, unable to start up)"
 
II'm hardly get used to the mis-matched control logic (Circle for cancel rather than confirm). So I start this thread and ask for your help.

Can I re-sign the kelf of ROM DVDELF so that I can use it as a DVD Update by some tools/methods?
Or, if it is possible to reverse the control of Circle and Cross in the DVD Player Modification?
You can put the 3.11 dvdplayer.elf from BEEXEC-DVDPLAYER (O for cancel) or the one from
BIEXEC-DVDPLAYER (X for cancel) in your BCEXEC-DVDPLAYER folder.
 
Have tried: Decrypted and encrypted the stock DVDELF via kelftool and replaced the dvdplayer.elf of DVD Player Modification, and copied the whole BCEXEC-DVDPLAYER to memory card where FMCB installed. Also tried using kelfTwinSigner with osdmain of FMCB. To both cases, the DVD Player failed to start up with an error: "DVD 播放器未设定,无法启动。(DVD Player was not setup, unable to start up)"
There is no public tools besides PS3MCA Tool, which signing *.xlf for Memory Cards, only HDD (__mbr/PP).

To getting work Twin Signer You need valid header (see above) and of course matched for Your MC fields kc and kbit (You've got it from FMCB files).
 
To getting work Twin Signer You need valid header (see above) and of course matched for Your MC fields kc and kbit (You've got it from FMCB files).

Oh... So the only way to get a valid header for Memory Card is to using PS3MCA Tool? Thanks for this information! Now I know why it didn't work.
 

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