LastName = TRIM(LEFT([FullName],SEARCH(",",[FullName],1)-1))
FirstName = TRIM(LEFT(TRIM(RIGHT([FullName],LEN([FullName]) - SEARCH(",",[FullName],1))), SEARCH (",",TRIM(RIGHT([FullName],LEN([FullName]) - SEARCH (",",[FullName],1))),1)-1))
MiddleInitial...