Thanks for all of the replies. I found an additional way to qualify is the draconic heritage feat from Races of the Dragon. Two of the dragons give a knowledge skill as a class skill. Still the sorcerer needs 4 feats to qualify for the prestige class 1,1,3,6 assuming a human. (versus 2 for a wizard assuming bonus feat and scribe scroll) Any suggestion of a full caster level prestige class that doesn’t require a feat other then item creation, skill focus knowledge, or meta-magic. Alternatively if the prestige class costs a feat but then gives a feat that helps qualify for loremaster that also works. On the idea of asking for special circumstances and situations I’m to lawful of a person to want to do that.