R4 DS Official Website: http://www.r4ds.com/R4 DS / R4 V2 / R4DS Cartridge is the current top-of-the-line in Nintendo DS SLOT-1 flash card. It is just an amazing little device like original Nintendo DS card size, it is a complete greate solution with no need to purchase any additional components or deal with any messy software and truly the easiest media enhancer you have ever done; To simply put it, this is a must have peripheral for any regular DS/DS lite owner.
Click the following link to download R4 DS Software: R4 DS Software Download
R4 SDHC Official Website: http://www.r4i-sdhc.com/R4 SDHC are SLOT-1 flash cards for NDS console series (R4i SDHC supports DSi XL). They are upgrade versions of R4 with multi-media features which can support SDHC and run most games and homebrews. They have widely been owned by many NDS player users.
Click the following link to download R4 SDHC Software: R4 SDHC Software Download