Go to System > Boot ISO and select your newly patched English ISO.
If you're looking for a Yu Yu Hakusho game that actually has a translation patch, you might be thinking of the title (known as Yuu Yuu Hakusho: Makyo Toitsusen yu yu hakusho forever ps2 english patch
Import Game of the Day | Yu Yu Hakusho Forever (PlayStation 2) Go to System > Boot ISO and select