LAA is Large Address Aware, which is a small utility program that allows you to set a bit to give a program access to more RAM on your computer. If you have 4 gig or more of RAM, and a 64-bit OS, you can use LAA and potentially have a better running game. CapnScurvy has a thread
Windows10; Large Address Aware; SH4 Install, full of info on it, and its use in Win10, but a good portion applies back to Vista 64-bit also. You shouldn't lose what you have thus far in the game with either it or the use of the patch.
