Arcane Preparation and Sanctified Spells

[Cheiromancer]

Despite The Souljourner's caution

Don't mix 3.0 and 3.5, it does wacky things.

I was wondering about the restriction on sanctified spells in the Book of Exalted Deeds, and whether a feat from Tome and Blood could help. It says in the BXD that

Spellcasters prepare sanctified spells just as they do regular spells, and casters who do not prepare spells (including sorcerers and bards) cannot make use of them except from a scroll.

I think the bit about scroll use is key; sanctified spells are effectively on the spell-list of sorcerers and bards, since you can't use a scroll of a spell that is not on your spell list. From the SRD:

To have any chance of activating a scroll spell, the scroll user must meet the following requirements.

[snip]

• The user must have the spell on his or her class list.

Sanctified spells cannot, it seems, be cast without preparation. However a sorcerer or bard could learn a sanctified spell of the appropriate level; it just wouldn't be very useful. But if a sorcerer has the Arcane Preparation feat (from Tome and Blood) he could prepare it in one of his slots and *then* it could be cast.

Is this right? The reason I am asking is because of this little bit of text from BXD:

Sanctified spells are specific to no character class. They are neither inherently arcane nor divine spells. A divine caster casting a sanctified spell casts it as a divine spell, while an arcane caster casts it as an arcane spell.

The reason I ask, is that I would like to build a cleric 8/Nar Demonbinder 1 character that is eligible to take Mystic Theurge. Arcane Preparation at level 9 would allow a second level sanctified spell to be prepared in a Nar Demonbinder spell slot, and thus meet the pre-req's for MT.

Aside from the issue of mixing 3.0 and 3.5 material, I would like to follow the rules precisely. Thus my question.

P.S. Evil characters could use corrupt spells from the BoVD to do the same thing- the wording corresponds exactly. Neutral characters could, as well- not all corrupt spells have the evil descriptor.

 

[Gaiden]

I personally have no problem mixing 3.0 and 3.5. In fact I have a "3.25" which is a mixture of the good in both (paladins turning at 3rd level, the new ranger, etc.) I'd say go for it - it makes perfect sense.