That is not related to the Chameleon bootloader, welcome to the black hole.
We cannot support iBoot or multibeast here, go to the tonymacx86 forums for support.
It has already been established that the Zotac GTX460 needs special treatment and a solution has been posted on InsanelyMac, now confirmed working by two users.
Regarding NVEnabler and the issues that are specific to the Zotac GTX460, continue in the thread on Insanelymac where this issue is being discussed. Post your specs there, post more information about your installation method, post the contents of your configuration files such as /Extra/smbios.plist and /Extra/com.apple.Boot.plist. You must provide more information for someone to be able to help you.
Install Chameleon 2.0 RC5. Until it's working you can still boot with iBoot.
Latest (well, recent) files:
http://forum.voodooprojects.org/index.php/topic,1896.msg9851.html#msg9851Install guide:
http://forum.voodooprojects.org/index.php/topic,649.0.htmlIf you have any questions about installing or using Chameleon 2.0 RC5, feel free to post on the General board here.