A few things I'm gathering from poking around the reflash packages and various pages on the Web:
1
) The Sylvania reflash package includes the additional step "0. Erasing nand flash . . . Erase nand flash successful!" One other unidentified CE 6 reflash package for the 7" WM8505 netbook also includes this instruction.
(It's written into the scriptcmd file in both cases.
) Both of these packages create the "System Disk" and "Flash Disk" folders, and both successfully flash the normal mode image.
(Of course it displays wonkily because it's the wrong resolution.
) No other 7" reflash package, and none of the 10" ones, have this additional instruction in scriptcmd, and all of those others result in the "System Disk no existed" error.
2
) Creating a "System Disk" folder manually in the safe mode and then running the autorun.exe file eliminates the "System Disk no existed" error, but then you get an error message "Copy to System Disk failed." Copying the entire System Disk folder
(including its contents
) from the SD card to the root of the device does not work because the storage memory is locked at a set level and there is not nearly enough space.
3
) In all cases, when the safe mode boots, it asks for a driver for "Unidentified USB Device," even though nothing is in any of the USB ports.
(I noticed on a few Web pages that people commented that some of these devices boot from an "internal USB disk," whatever that means, but there is no internal USB port in the Wabook. However, I also notice that my 7" WM8505 netbook has a folder in root called "USB Disk" with nothing inside. Any actual USB drives plugged into that device are identified as "USB Disk2," "USB Disk3," etc.
)
4
) All the 10" safe modes only take up about 580 pixels of height of the display, with a dark strip below the taskbar about the same height in pixels as the taskbar. When any part of the top 20 pixels of the display change, that change shows up inside that bottom strip as well - a big distraction that spoils the look of the display.
5
) Exchanging the names of the two .nb0 files in the reflash package
(normal_nk.nb0 and safe_nk.nb0
), which some have reported to solve the problem, doesn't work because the device hangs after step 3
("Upgrade safe mode successful!"
).
I suspect that the scriptcmd files are written incorrectly, but I don't know how to edit them to make them correct. Anyone else have any ideas?
(DeveloperOne's ScreenSnap is also free, and has a hotkey setting feature.) 
