I think I know what the problem is here.
You don't install hacks from your webbrowser or from your control panel.
The way you install hacks is something like this:
1. Open the hack in Notepad.
2. Follow the instructions. The instructions usually are something like this:
*********
What you do is follow the instructions. Open the file postings.cgi (which is on your harddrive) in notepad. Then edit it by following the instructions.
After you are done, upload the edited file to the cgi-bin directory on your webserver (overwrite the postings.cgi there, but make sure to keep a backup!)
That's the way it works. If you would make me an admin on your board I still wouldn't be able to install hacks. You need FTP access to do this.
I hope you understand the problem now...
Cheers,
CT.