Hi Ryan, thanks for the response.
Considering how explicit dynamic linking works in Windows, a simple hack will fix this (because, fortunately, the programmer chose to locate the GetNativeSystemInfo entry point in KERNEL32.dll by name, rather than by ordinal number).
A straightforward winutils.dll edit (e.g. with SlickEdit, of course) replacing the single appearance of the "GetNativeSystemInfo" in the executable with "GetSystemInfo", padding the unneeded 6 bytes with zeroes, makes SlickEdit Core function normally in Windows 2000.
A rather innocent fix. Thought I would share this with you (and any other interested user, if SlickEdit support doesn't mind).
Regards,
-TioP