Display Distinct Records?

TableName: Order_Archive
Fields:
orderid
load_date
filename
order_date
dollar

I load a file each week into a table, each file has unique orderid, load_date, filename, order_date and dollar. However the same orderid, order_date and dollar could appear in another file with different load_date and file_name.

File1:
orderid, load_date, file_name, order_date, dollar
'1000', '2011-01-01', 'File1', '2011-01-01', '101'
'1001', '2011-01-01', 'File1', '2011-01-01', '102'
'1002', '2011-01-01', 'File1', '2011-01-01', '103'

File2:
orderid, load_date, file_name, order_date, dollar
'1001', '2011-01-08', 'File2', '2011-01-01', '102'
'1002', '2011-01-08', 'File2', '2011-01-01', '103'
'1003', '2011-01-08', 'File2', '2011-01-01', '104'

Question:
whats is the best way to retrieve the distinct records that has the most recent load_date? expected results below:

Expected Results:
orderid, load_date, file_name, order_date, dollar
'1000', '2011-01-01', 'File1', '2011-01-01', '101'
'1001', '2011-01-08', 'File2', '2011-01-01', '102'
'1002', '2011-01-08', 'File2', '2011-01-01', '103'
'1003', '2011-01-08', 'File2', '2011-01-01', '104'