This is the kind of question where Spycraft is definitely the best answer. I don't know if you have the book or not, but there is a feat named Flawless Indentity that does exactly what you need. Actually, not exactly but even slightly better. Let's try a quick conversion.Flawless Identity
You're used to work on the fringe of the law or in high-risk situations. You don't mind getting into trouble, as long as it doesn't affect your personal life. Hence your many other names...Benefit
: You gain a number of specific, fake identities equal to your starting action dice. You must choose these identities when you take this feat. Changing identities thereafter requires 1 week Downtime per identity. Each identity comes with a complete disguise, papers, and all (inexpensive) gear and (unrestricted) information necessary.
Slipping into character requires 1 minute and 1 action die, but once you're in, you're in
. You're not considered to lie when you talk the truth from your identity's perspective, and you're basically not the same person anymore. You even gain 2 temporary Interests that match your identity while in character. One of them may be used to acquire, conceal, or change your Alignment, if any. Even magic cannot reveal who you are, unless specifically mentioned.
If someone investigates about one of your cover identities, they must achieve a DC 30 Research check that takes 2d6 days, modified as per Table 2.15: Researching (see page 77)