I tried this, and used \windows\system\sdbinst.exe to install the sdb into the registry, but it didn't work. Instead, I have to run multiple instances of a program that allocates 512mb of ram, then goes idle, until you close the program. The program is called w512mb.exe. This program is included, along with a sample batch file, w2048mb.bat, that creates 4 instances of w512mb.exe, which works on my system, and a readme.txt file.
w512mb.zip