Hm, Lynn, you sure it is under mods?
This is what I found:
Documentation
Read the guides on using the phpBB2 system.
MODS-Database
Here you can download and submit completed modifications.
MODS-Database (pre 2.0.4)
Here you can download and submit completed modifications.
Check Your MOD Template Syntax
Here you can check your modifiction template syntax before uploading it to the mods database.
Biki