You need to download the new update "R4-III v3.03 kernel (English) 2008-9-11" from http://www.r4dsl.net/download-en.asp
Format your micro sd card and then extract the downloaded file and copy all files to your micro sd card.
After this copy your ds rom to the root directory of the card.
Insert in the ds lite and after a couple of seconds you will see the R4 menu, click the icon on the left to see the list of roms installed.
Loading problem with R4 III
You need to download the new update "R4-III v3.03 kernel (English) 2008-9-11" from http://www.r4dsl.net/download-en.asp
Format your micro sd card and then extract the downloaded file and copy all files to your micro sd card.
After this copy your ds rom to the root directory of the card.
Insert in the ds lite and after a couple of seconds you will see the R4 menu, click the icon on the left to see the list of roms installed.