what do you mean by "conditional"? what would the conditions be?
if you can get an official copy of your SAT score, you should send that with an addendum as evidence that you do poorly on standardize tests but do well in classes. though i should add that this depends on where you're applying. for many schools, a 3.1 is not a good GPA, so you won't be able to point to it as evidence that standardized exams aren't indicative of your true ability.
if you interview well, you should try to get interviews. take any opportunity to show your interest in a school and to make your file shine despite your numbers.
victor, are you asking about the prep course out of curiosity? i don't think that's relevant to his situation, if you're asking as though it would be a factor in the advice you give him. the LSAT score, his school, and where his score puts him relative to others in the school is relevant information, as is where his GPA puts him relative to his schoolmates.
and what does it mean to "bomb really well"? you bombed and did well, meaning you did okay? you bombed really badly?
the post makes me feel like this: