Well, i've searched and searched the net for months and i didn't find any way to upload a wallpaper or ringtone by cable. There is no software to do that. I also tried with cb2000 (found at
http://www.phantom2k3.pwp.blueyonder.../Panasonic.htm but no luck, needs a special format for wallpapers and games with "ctc" extension.
I can give you some wap adresses if you want to change the way your mobile looks.
For wallpapers:
http://www28.brinkster.com/gd67/HTML/ http://c0re.host.sk/mywap/index.php http://gd67.wz.cz/ this one has a temporary problem.
For ringtones just try
http://www.tagtag.com and search for gd67 (you need firmware A29 and above)
I've heard that the ringtones from
http://www.esato.com are working with gd67
For monophonic ringtones try
http://www.codingworkshop.com/ (there is something mentioned about polyphonic ringtones but i've not tested it yet)