Mortgage Reports

I have seen some postings regarding "mortgage reports." Is a mortgage credit report compiled off of all three credit reports? We are going to be buying a house in the next 3-6 months and I was wondering if there is any way to see how lenders "view" you as an applicant (without actually applying for a loan yet)?

I have also seen different things regarding FHA loans...that they do not use your FICO score. Is this correct?