When you buy an R4, look on its box, it should have the address of the web site where you can download the right OS. Its no good installing V1.18 on a R4SDHC it wont work.

There are many R4's out there, copies of copies :) get the right program for your R4.

Use the Panasonic MicroSD card formatter, DO NOT USE YOUR PC !

Install the system first BEFORE you put anything else on, boot it up, let it make its SYS file before you add games.

Make a folder on your SD card called Games, put all your games in there.

Make a folder called Movies, put all your converted movies in there.

Moonshell must be setup for the R4, get the full program, it comes with movie converter and a program to make thumbnails for your pictures.

Use Kingston microsd, dont use crap memory cards
The standard R4 can use upto 2Gb while the R4SDHC suppose to work up to 32GB, if you can play movies when you have gone over 4Gb, then your R4 only supports 4Gb

There are so many R4's out there, and they all have the right programs, most cannot be used on other cards

Latest R4 (Original) V1.18 max 2Gb MicroSD
Latest R4SDHC V1.25 use 4Gb microSD

Both support themes (1 for each month) = 12
Moonshell 1.7 run setup and select R4 you make your files.

R4SDHC
_system_
moonshl
_DS_MENU.DAT
_DS_MENU.INI
_DS_MSHL.NDS

Now add these folders if you want them
Games
Movies
Pictures
MP3

Press all DS buttons for reset