Wood R4 card made originally from www.r4ds.com can run R4DS official Kernel V1.18 (2008-4-24) or Wood Kernel. Wood R4 DS is known as Wood kernel issued by YWG ever sine Apr 2010, and it is just the former R4 DS card
Have you heard Wood R4 .NDS Boot file ? How to use Wood R4 .nds boot file ? Sure, you must have been using R4DS YSMenu for your Wood R4DS.