I was just wondering if there was som D&D material dealing with Rashemen, witches and dejeema quests and all that?

well, by the rules they put in wizards and rogues of the realms (I don't have the warriors/priests book) the Witches of Rasheman are all female and are sorcerors (as per bg2) except that they learn spells normally (ie study scrolls) so they have a much larger variety, their main drawback is that they take twice the normal casting time to use their spells, I think the warriors of Rashemon are all berserkers (from the fighters handbook) but i'm not positive (like I said I haven't read the book, just the brief entry they're given in the heroes lorebook)