Only if you change the source code of the OSE version and change the max allocatable amount of RAM and compile it yourself. Anything else is not possible yet.
This question with Windows Server 2008 was asked before. If it really won't install with less than 4 GB of RAM, you might want to run vLite on it to remove that need. You can find vLite on
http://www.vlite.net and download it. However, MS shouldn't have this option, as it should allow you to run it in a VM or at least a test machine with less than 4 GB of RAM.