Be happy to supply any troubleshooting data that I can. I even tried renaming Default(Portrait).skn to a temp name, putting all your files directly into the \Program Files\Windows Media Player\ directory and naming your portait skin to Default(Portrait).skn, but wmp10 freaked out and didn't think I had any skins installed when I tried that.
Anyway, the version is 10.1 build 14366.
If it helps, the default file, Default(Portrait).skn contains the following text:
24#\Windows\portrait192.skn
The file "\Windows\portrait192.skn" contains the following:
[Pocket WMP Skin File v9.0.1]
[ Description ]
// <X,Y> <DPI>
// ------ -----
Dimensions 480, 640 192
// <Orientation>
// -------------
Orientation Portrait
//////////////////////////////////////////////////////////////////////////////
[ Bitmaps ]
// <Name> <File name> <X,Y>
// ------ ----------- -----
Background portrait192.gif 0,0
Disabled disabledP192.gif 0,0
Pushed pushedP192.gif 0,0
//////////////////////////////////////////////////////////////////////////////
[ AlbumArt ]
// <Location>
// ----------
10,74,460,310
//////////////////////////////////////////////////////////////////////////////
[ Video ]
// <Location>
// ----------
10,74,460,310
//////////////////////////////////////////////////////////////////////////////
[ Buttons ]
// <Function> <Type> <Location> <Push Image Src> <Dis Image Src> <Hit R,G,B> <Norm 2 Image Src> <Push 2 Image Src>
// ---------- ------ ------------ ---------------- --------------- ----------- ------------------ ------------------
PlayPauseStop NA 202,440,76,86 Pushed @ 158,0 Disabled @ 158,0 0, 0, 0 Pushed @ 420,0 Pushed @ 496,0 Pushed @ 572,0 Pushed @ 648,0
Prev NA 136,450,58,66 Pushed @ 100,0 Disabled @ 100,0 0, 0, 0
Next NA 286,450,58,66 Pushed @ 234,0 Disabled @ 234,0 0, 0, 0
Mute NA 380,404,28,32 Pushed @ 392,0 Disabled @ 392,0 0, 0, 0
VolumeUp NA 424,440,50,58 Pushed @ 342,0 Disabled @ 342,0 0, 0, 0
VolumeDown NA 368,454,50,58 Pushed @ 292,0 Disabled @ 292,0 0, 0, 0
FullScreen NA 8, 440,50,58 Pushed @ 0,0 Disabled @ 0,0 0, 0, 0
WindowsMedia NA 64, 454,50,58 Pushed @ 50,0 Disabled @ 50,0 0, 0, 0
//////////////////////////////////////////////////////////////////////////////
[ Text ]
// <Item> <Location> <Align> <Font> <Color>
// ------ ---------- ------- ------ -------
VolPercent 410,406,64,26 Right Tahoma,8,N 0,41,99
Time 10,406,100,26 Left Tahoma,8,N 0,41,99
Status 10,44,420,26 Left Tahoma,8,NE 255,255,255
//////////////////////////////////////////////////////////////////////////////
[ Marquee ]
// <Location> <Font> <Color> <Text item combinations>
// ---------- ------ ------- ------------------------
10,10,311,32 Tahoma,10,B 255,255,255 Title,Filename
//////////////////////////////////////////////////////////////////////////////
[ Trackbars ]
// <Function> <Location> <Dis Image Src> <Thumb Image Src> <Thumb Size>
// ---------- ---------- --------------- ----------------- ------------
Seek 114,408,256,20 Background @ 114,408 SeekThumb192S.gif 40,20
//////////////////////////////////////////////////////////////////////////////
[ Ratings ]
// <Location> <Image>
// --------------- --------------------
321, 4, 153, 37 ratings192S.gif