[Upgrading, Modifying and Unlocking] nonpaq:
I tried the Fix_WM6_Sounds.CAB file from above on Football's wm6 A03 preview. Works well. Adds the "dinks" and other sounds when clicking the menu. After CAB install, I did not notice the new sounds until a soft reset.

In the Football x51v WM6 thread, someone complained that there is no 'uninstall' of the CAB if you want to stop the new sounds. What I noticed is that after you install the CAB and go to Sounds and Notifications, the settings may be unchecked even though the sounds are activated. Just enable all the settings for the sounds (even if they are already active) then uncheck them. (i.e. cycle on, then off) By unchecking Events, Screen Taps and Hardware buttons, I was able to 'silence' my Axim as before.

Edit: Menu clicks are part of Events. After this CAb install, you can't silence the clicks without silencing all event sounds. See this thread for more info and two other sound schemes you may want instead of this one that adds all sounds back to wm6.

Note: It appears that all of these CABs add missing/new sound files and registry entries to access them. Fix_WM6_Sounds.CAB adds sounds to the scheme called .AllSounds. The CABs in the other thread add two more (.WM5 and .WM6). According to that thread, you can switch between them by changing the registry entry for HKEY_LOCAL_MACHINE\Snd\Event\.Scheme followed by a soft reset. You could also edit the .AllSounds key to remove the sound file definition for menu actions. See the other thread for the locations of the string in the key. (looks like its position 10 & 11).

This is another useful post about sound schemes.

Update: I created this Registry code that defines a new scheme called ".SomeSounds" and sets this as the scheme to use. The only difference between this and .AllSounds is that I set menupop and menusel to "empty" sound, thus eliminating the clicks on menu but not the other events. Note : you need to do a soft reset after importing the registry. Use a software based soft reset because for some reason the hardware reset button on the back will reset the registry back as well. I use the soft reset button on pBar.

[HKEY_LOCAL_MACHINE\Snd\Event]
".SomeSounds"=hex(7):41,00,73,00,74,00,65,00,72,00,69,00,73,00,6b,00,00,00,43,00,6c,00,6f,00,73,\
00,65,00,00,00,63,00,72,00,69,00,74,00,69,00,63,00,61,00,6c,00,00,00,64,00,\
65,00,66,00,61,00,75,00,6c,00,74,00,00,00,45,00,6d,00,70,00,74,00,79,00,00,\
00,65,00,78,00,63,00,6c,00,61,00,6d,00,00,00,69,00,6e,00,66,00,62,00,65,00,\
67,00,00,00,69,00,6e,00,66,00,65,00,6e,00,64,00,00,00,69,00,6e,00,66,00,69,\
00,6e,00,74,00,72,00,00,00,65,00,6d,00,70,00,74,00,79,00,00,00,65,00,6d,00,\
70,00,74,00,79,00,00,00,4f,00,70,00,65,00,6e,00,50,00,72,00,6f,00,67,00,00,\
00,71,00,75,00,65,00,73,00,74,00,69,00,6f,00,6e,00,00,00,4e,00,65,00,74,00,\
62,00,65,00,67,00,00,00,4e,00,65,00,74,00,65,00,6e,00,64,00,00,00,4e,00,65,\
00,74,00,69,00,6e,00,74,00,72,00,00,00,73,00,74,00,61,00,72,00,74,00,75,00,\
70,00,00,00,57,00,69,00,6e,00,64,00,4d,00,61,00,78,00,00,00,57,00,69,00,6e,\
00,64,00,4d,00,69,00,6e,00,00,00,52,00,65,00,63,00,53,00,74,00,61,00,72,00,\
74,00,00,00,52,00,65,00,63,00,45,00,6e,00,64,00,00,00,00,00
".Scheme"=".SomeSounds"

[HKEY_LOCAL_MACHINE\Snd\Scheme]
".SomeSounds"="Some Sounds"