Disguise undead (Spell Compendium 66) is a glamer that adjusts the touched corporeal undead creature to look like a similarly-shaped creature to an extent you decide, and also masks the undead creature’s undead nature, stating the following:
The spell also foils magical means of detecting undead. The subject of disguise undead detects as a creature of the type simulated.
Does this mean a mummy disguised as an astral deva (an angel with 12 Hit Dice) would have an overwhelming aura of good for the purposes of detect good spells? If it’s an evil mummy, would it also have an overwhelming evil aura (as appropriate for an evil angel), or only a faint evil aura (as appropriate to a non-undead non-outsider non-cleric with 8 Hit Dice)? No evil aura at all?