Vista equivalent to the /3GB boot.ini switch

My computer only has 2GB of RAM installed and I can see all of this memory
so this question has nothing to do with not being able to see installed
memory.

My question is thus:

"How do I get a LARGEADDRESSAWARE application to see more than 2GB of
virtual memory?"

On XPSP2 and Windows Server 2003, you can add the /3GB boot.ini switch to
let LARGEADDRESSAWARE applications access memory beyond the 2GB limit. I
cannot find any equivalent option in the Vista boot configuration that will
enable this. This has nothing to do with PAE (which allows access beyond the
4GB limit) and does not require a 64bit OS. This is specifically for 32bit
CPUs running a 32bit OS and there is no requirement for any specific amount
of physical RAM. How do I enable this for Vista (on a 32bit CPU and x86 OS)?

If the answer is -- "you need a 64bit OS" -- then IMO Vista is a step down
in functionality and limits functionality on very capable x86 platforms.

Thanks,
Tim