OK, then let's set this in stone...
1. The Pathfinder PRD will be our primary rules authority. The resource in question can be found at:
http://paizo.com/pathfinderRPG/prd/2. The only setting reference we'll use is the Forgotten Realms boxed set (TSR 1031), with some era-relevant material drawn from Faiths & Avatars (TSR 9516). As I admit only a modest knowledge of FR and no interest in studying the novels or holding to its canon beyond 1357 DR, I will consider these references alone to be authoritative.
3. We will also use some rules found in the later Forgotten Realms Campaign Setting sourcebook (WTC 11836). However, this will only be select rules such as feats, spells, domains, or bonus starting gear based on geographic origin. Rules will be employed only in cases where they supplement (rather than contradict) the PRD.
4. To avoid some problems we've had in past campaigns, non-spontaneous casters must keep a list of memorized spells and will only be given extremely limited time to select which spell they intend to cast that round. You don't get 20 minutes to study the book in the middle of a fight.

Holy or unholy. Only one homie. Only this gun. Lonely 'cause don't anyone know me.