The swap file name. By default the file is in the root directory of the current drive. Specify the complete path name if you want to keep the swap file somewhere else. By default the file is not deleted. Program startup is quicker if the file is not deleted.
More RAM looks pretty cheap.
When you are using a large amount of virtual memory relative to RAM size you may have to do the following to convince Windows 3.xx to cooperate. Windows 95 generally works OK if memory allocation methods for DOS are all set to Auto.