I searched the forum and didn't find any references to this so I figured I'd post what I've found. While trying to get the EditorApp to work (I'm still trying) I was stepping through the source and found a problem in the CheckMemory function in the initialization.cpp file under the GameCode3 project. I kept getting a GameCodeError every time the code called GlobalMemoryEx. The problem is that the MEMORYSTATUSEX structure length is not being set prior to the call. Once I added code to initialize the structure the call worked without a problem. Now if I can just get the #$%# EditorApp to work! 
The modified source code follows:
void CheckMemory(const DWORDLONG physicalRAMNeeded, const DWORDLONG virtualRAMNeeded)
{
MEMORYSTATUSEX status;
status.dwLength = sizeof (status); //<== This line was added
GlobalMemoryStatusEx(&status);
if (status.ullTotalPhys < (physicalRAMNeeded))
{
// you don't have enough physical memory. Tell the player to go get a real
// computer and give this one to his mother.
throw GameCodeError(GCERR_INIT_NOT_ENOUGH_PHYS_RAM);
}
.
.
.
In the version of the code I am running the CheckMemory method starts at line 74
The modified source code follows:void CheckMemory(const DWORDLONG physicalRAMNeeded, const DWORDLONG virtualRAMNeeded)
{
MEMORYSTATUSEX status;
status.dwLength = sizeof (status); //<== This line was added
GlobalMemoryStatusEx(&status);
if (status.ullTotalPhys < (physicalRAMNeeded))
{
// you don't have enough physical memory. Tell the player to go get a real
// computer and give this one to his mother.
throw GameCodeError(GCERR_INIT_NOT_ENOUGH_PHYS_RAM);
}
.
.
.
In the version of the code I am running the CheckMemory method starts at line 74