What creatures are you asking about? Some of the stuff is probably easy to convert using the 3.0 to 3.5 conversion rules on the WOTC site like for the MMII.
You're right, but I just wanted an outside opinion. The creatures in question are the jigokomushi, nail stealer, needlejack, somnophis, and tree devil.
Also, I have another question. Are there any rules for updating the spell lists for the elementalist and astrologer classes in Occult Lore with other materials? Thanks in advance.