aqua

boot.sdi isn't where you change the size of the "RAM" disk. To do that, you need to change/add the following registry key in the WinPE 2.0 .WIM install: HKLM\SYSTEM\ControlSet001\Services\FBWF\WinPECacheThreshold (it's a REG_DWORD) to 0x40 (for 64 MB). In practice, to achieve this, you need to load the SYSTEM hive from \Windows\System32\config\SYSTEM inside the WinPE image, modify it, unload it, and update the .WIM image. Aqua