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The string "MISSING: 'GUI:SupW_SuperweaponParticleUpLinkCannon" must be set in generals.csf in Data\Language\... before it will display the correct name. Of course only "GUI:SupW_SuperweaponParticleUpLinkCannon" without "MISSING: "
And of course it's possible to add new commands to the shortcut bar. But there's a limit of 11 shortcuts, so if you already reached this limit you can't add more shortcut powers. In the other case open your CommandSet.ini and search e.g. for "SpecialPowerShortcutUSA"
Code:
CommandSet SpecialPowerShortcutUSA
1 = Command_SpyDroneFromShortcut
2 = Command_ParadropFromShortcut
3 = Command_A10ThunderboltMissileStrikeFromShortcut
4 = Command_EmergencyRepairFromShortcut
5 = Command_DaisyCutterFromShortcut
6 = Command_FireParticleUplinkCannonFromShortcut
7 = Command_SpySatelliteScanFromShortcut
8 = Command_CIAIntelligenceFromShortcut
9 = Command_SpectreGunshipFromShortcut
10 = Command_LeafletDropFromShortcut
11 = Command_TomahawkStormFromShortcut ; << your new superweapon
End
Furthermore you have to define how much shortcut powers a faction can use as maximum. So go to PlayerTemplate.ini and search e.g. for:
Code:
SpecialPowerShortcutButtonCount = 11 ; << new COmmandSet uses 11 instead of 10
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I dunno if it's this what you mean but...
If you mean the build clock color look in ControlBarScheme.ini and search for "BuildUpClockColor". There you can define Red-Blue-Green-Alpha values to give it a new color. You have to do it for each faction.
The flash image when you click on a button is hardcoded afaik. Maybe there's any texture you can modify but I didn't find it up to now...