6.1 only
But, there are only a couple things that would need to be done to make it think it's running on 6.1...
1. Add the B_FileCounter field to w3t_Posts.
2. Add the table prefix variable to config.php.inc
3. Add the cookie prefix variable to config.php.inc
4. Put a copy of your download.php script from 6.1 into your 6.0.3 directory.
Then I believe it should work. When you make the move to 6.1 just drop the B_FileCounter field before altering tables so the alter table script doesn't get an error.
SQL Query to use would be:
ALTER TABLE w3t_Posts
ADD B_FileCounter INT(9) DEFAULT '0'
Did I say couple? LoL
