reated by Daniel Pistelli, a freeware suite of tools including a PE editor called CFF Explorer and a process viewer. The PE editor has full support for PE32/64. Special fields description and modification (.NET supported), utilities, rebuilder, hex editor, import adder, signature scanner, signature manager, extension support, scripting, disassembler, dependency walker etc. First PE editor with support for .NET internal structures. Resource Editor (Windows Vista icons supported) capable of handling .NET manifest resources. The suite is available for x86, x64 and Itanium...
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this tool contains alot of goodies and one of them is to make application use more then 2gb of ram or less.
How to use this tool
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1) Download explorer suite
Here
2) After you finish downloading install it and run CFF Explorer
3) Now open a application or a game you want (i'll be taking firefox for example):
Click on the file header under NT header and go to the click on the Click here button in the Characteristics container
4) check or uncheck App can handle >2gb address space
5) save and overwrite the file whcih you have changed
Tip : Don't forget to make a backup of the app