Most likely the discrete codes you are looking for don't exist.

But if you want to test all 256 possible commands and see what each does, that can be done starting with MakeHex plus either IrPanels or Hex2CCF

[Link: john.fine.home.comcast.net]
[Link: remotecentral.com]
[Link: remotecentral.com]

Be sure to read the readme file included in MakeHex.zip

Use the NEC1.irp file, and edit it to set
Device=0

The output from MakeHex should be fed to either IrPanels or Hex2CCF to create a CCF file with 256 numbered buttons. Then convert or merge that into a file for your remote. Then test.

The buttons you posted are:

10 power toggle
75 eject
19 rec
29 play
25 reverse
88 review
93 pause

If those numbered functions don't work from the numbered buttons produced with makehex, then you did something wrong and testing the rest of the makehex codes would be a waste of time.
But if those work then probably every function your DVD can perform is covered by buttons 0 to 31 plus buttons 64 to 95. If those don't include discrete power commands, there probably aren't any. There is a tiny chance the commands you want are in functions 32 to 63 or 96 to 255. I'd bet against it, but if you go to the effort of merging the set of 256 buttons into a file for your remote, you might as well press all of them and see.