R4

Do RAR files work with the R4 ???

No. .rar files are a compressed file using WinRAR. You need to extract the files from the RAR using WinRAR.Read this Tutorial:
https://www.romulation.org/forum/index.php?topic=3880.0

a rar file is a compressed file (i.e. usually for compressing installers)

no they dont. if you need an archive software, download an archive software from www.jzip.com. the best part its FREE hell yeah!! then take the rom out of the archive system.

It's no different.

if u already have an archive prog installed and associated with .rar files, just double click the .rar wherever u saved it and then extract the .nds file to the directory where ur SD for ur flashcard is.

thanks so much!!!