seeing win98 is on the same platform with ME, Win9x can theoretically support 2 GB of physical ram, and another 2 GB of virtual ram so I expect the same values for ME.
be aware that if you're going to exceed 512Mb then you'll get "out of memory" errors unless you add the line
MaxFileCache=512000 to the [vcache] section of system.ini to limit
vcache to 512 MB, preventing runaway sizes, which can disable, or
hinder, performance, by preventing other necessary processes to occur in
the first 2 GB of memory.
see
this KB article!
