are you sure that gw launcher supports browsers under 4.x?Yeah. And as far as I know only Gateway's launcher supports browser versions lower than 4.x's.
We should ask the guy who created the thread (roxas?)
For a 2.x system I would recomment using a cart to upgrade to 4.1-4.5 then using a DS flashcart to install the mset rop.
cause i have one red card lying around here, so i could create emunand and switch to rxtools