Investigators with the Office of Federal Housing and Enterprise Oversight should have enough funds to complete special inquiries into accounting practices at Fannie Mae and Freddie Mac, following the Bush administration’s move late last week to boost the agency’s budget by $7.5 million. The requested budget amendment, submitted to Congress Sept. 12, represents a 23 percent increase over the funds originally allocated for Fannie’s and Freddie’s regulator in 2004. It includes money to pay