Hi,
First sorry for the inconvenience that has taken to you.
For the II part, you mean that you cannot download the file http://developer.download.nvidia.com/devzone/devcenter/mobile/tadp200/017/tadp_vars.txt manually . And this is the problem that the installer cannot work. I doubt that something wrong in your network or your firewall has blocked this. Please check and relaunch the installer after your can get the URL successfully.
BTW, I find that you used an old version and we have TADP 3.0r4 and you can get the latest and enjoy it.