[Upgrading, Modifying and Unlocking] BenThon:
Thanks for sending themes from your XPERIA. The theme which is of interest is "XPERIA Black.tsk".

Analyzing it with my freeware MSCEInf, we have :

[FONT=Courier New][SIZE=1][FONT=Courier New][SIZE=1][Version][/SIZE][/FONT]
[SIZE=1][FONT=Courier New]Signature = "$Chicago$"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]CESignature = "$Windows CE$"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]Provider = "SEUS"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][CEStrings][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]Appname = "XPERIA Black"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]InstallDir = "%CE1%\%AppName%" ; (%CE1%\XPERIA Black)[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][CEDevice][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]VersionMin = 4.0[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]VersionMax = 6.99[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]BuildMax = -536870912; Support square screen and screen rotation[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][SourceDisksNames][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]3 = ,"Dir3",,.\Windows[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][SourceDisksFiles][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]"stwater_800_480.bmp" = 3 ; 001[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]"stwater_480_800.bmp" = 3 ; 002[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][DefaultInstall][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]AddReg = ClesRegistre[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]CopyFiles = CopierVersDir01[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][CopierVersDir01] ; (%CE2% : \Windows)[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]"stwater_800_480.bmp"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]"stwater_480_800.bmp"[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][DestinationDirs][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]CopierVersDir01 = 0, %CE2%[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][Strings][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]reg_path00 = Software\Microsoft\Today\XPERIA Black.tsk[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]reg_path01 = Software\Microsoft\Today[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]reg_path02 = Software\Microsoft\Color[/FONT][/SIZE]
[SIZE=1][FONT=Courier New][ClesRegistre][/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_CommandBarText,0x00000001,DD,DE,DD,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_CaptionFlat,0x00000001,55,57,55,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_SoftkeyFlatCenter,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_CommandBarSip_Highlight,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_TitleFlatCenter,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_NavBarText_Highlight,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_HighlightText,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path00%,Color_Highlight,0x00000001,BF,BE,BE,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path01%,DPI,0x00010001,192[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKCU,%reg_path01%,UseStartImage,0x00010001,1[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,14,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,25,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,11,0x00000001,69,69,6A,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,40,0x00000001,D5,D5,D5,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,4,0x00000001,EC,EC,EC,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,16,0x00000001,C8,C8,C8,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,9,0x00000001,DD,DE,DD,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,12,0x00000001,00,00,00,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,BaseHue,0x00010001,123[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,13,0x00000001,9C,9D,9D,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,35,0x00000001,FF,FF,FF,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,34,0x00000001,4C,4C,4C,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,6,0x00000001,4A,4A,4A,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,39,0x00000001,E2,E1,E1,00[/FONT][/SIZE]
[SIZE=1][FONT=Courier New]HKLM,%reg_path02%,15,0x00000001,FF,FF,FF,00[/FONT][/SIZE]
[/SIZE][/FONT]

The 2 images are bmp with 16 bits / pixel and 72 DPI.

UseStartImage is set, so only the 2 Start images (for portrait and landscape are defined) with the names :

stwater_800_480.bmp

stwater_480_800.bmp

and these files are defined with no flags, whereas ThemeGenCE set the flags for images to 0x40000000.

There is another string defined in the TSK (CAB) which is "Start Menu". This string seems to be unused.

These are my first constatations. But I still need "A little Help from my Friends" to make ThemeGenCE compatible for these PDAs.

Thanks in advance.