The mod works great by the way.
When I ran the install.php as stated in step 2 it did not work. It worked if I ran it after I applied the premod files. The install.php should come after the premod files are applied
The install_using_premod_files.txt file states
"# STEP NUMBER II: Installing the Attachment Mod (Database)
#
# You should have uploaded the install folder (above), which is only needed for running the database installer.
# Make sure you uploaded the schema Files (those files ending in .sql) in ASCII Mode (This is the Layout and Data for your Database):
#
#
#
# Now we want to create the tables, therefore we run the install.php file (
http://www.yoursite.com/phpBB2/install/install.php)
# Please be sure to enter the correct URL (replacing
http://www.yoursite.com with your sites URL),
# the install.php file has to be placed within the install folder. If it is not within the install folder, you WILL get errors.
#
# After the install.php file hass been executed successfully, you should remove the complete install folder.
#
#
#
#
# STEP NUMBER III: Applying the pre-modified files"