Hey guys, now it works perfectly 
Indeed, I had to put 777 chmod to install_mod.php and to use it again, as Clariden said.
Thank you Frank for this nice mod.
Good bye.
1 2007-02-04 10:43
Re: Attachment Mod 2.0.1 by Frank H (500 replies, posted in PunBB 1.2 modifications, plugins and integrations)
2 2007-02-03 23:33
Re: Attachment Mod 2.0.1 by Frank H (500 replies, posted in PunBB 1.2 modifications, plugins and integrations)
Hello,
I am trying to install and configure Attachment Mod for my PunBB board.
The thing is that I have the same problem than FredrikK, which is the "Unable to move file from: /tmp/phpbTaHmT to /forum/attachments/5b965acd05257c60857c7d24937ead5a/198a17057604be15a9ff95aa6a0a9991.attach." error.
I have given 777 chmod to /forum/attachments folder, so as for the /forum/attachments/5b965acd05257c60857c7d24937ead5a one, and now I don't really know what to do 
Please, help me