Actually you can use r4i 3ds menù on your r4i 1.4.3, so, first... Get r4i 3ds menù v 1.43b or 1.44b ( the firsts Ones menus to have the 3ds 2.2.0 upgrade included) and put it on your r4i 1.4.3 micro sd, then put your r4 in your ds lite, select UPGRADE from the 3icon menu, and then wait for the...