mini210s NANDFLASH driver building issue

Peter21
Hi,

I have to modify nandflash driver for mini210s in WinCE6 BSP.

Altough, its source code is exists in the BSP (in
.\SRC\COMMON\NANDFLASH\FMD and .\SRC\DRIVERS\NANDFLASH folders) but they
projects are not placed in default build tree.
Instead, nandflash.dll can be found in .\FILES folder (in compiled binary
form) and this file is used by makeimg.

Unfortunately, I cannot build nandflash.dll because I got some compilation
error about missing STEPLDR_LENGTH constant.
This would define the length of steploader (and, I think, bootloader logo
also).
I cannot determine this constant because sources of SuperBoot are not
available.

Some information:
   BSP: Mini210-CE6-Suite-1313.exe
   SuperBoot210.bin: 540672 bytes, 2013-03-27 03:57:57

My BSP is newer than what I can download from the FTP (it was in DVD of the
purchased board).

Questions:
1. Is there a newer BSP than 1313? Where can I download it from?
2. Has anybody the correct (buildable) source files for mini210s nandflash
driver?

Thanks for any help.

Peter