NTCore has an excellent little program that will patch .exe files of applications letting them use 4gb of RAM. Typically these applications will use far less than the 4gb of RAM in a 32bit operating system. This 4GB Patch file is a tiny file that modifies the executable of files and creates a backup of the file. Once executed, you simply pick the .exe file and it will patch the file to use more memory.
The software will then ask if you have finished or if you need to patch another file.
If this does not work, simply delete the new .exe and rename the backup file back to the original name.