If you get a system error, that's because you haven't .net framework 2.0 installed on your PC.
Download it here .
Also, following update may be applied to fix general problems with this component.
Download .
Lack of user rights under Windows may prevent Modding Tools from working... especially when TDU is installed in Program Files folder.
To avoid this, be sure to always run these tools as administrator; right-click on TDU Modding Tools executable, then Run as administrator.
In this case, drag and drop features won't be available anymore, for security reasons (due to Vista's security policy). Sorry about that.
First, chill please :) These tools are not bug-free, however you can seriously help me to make them better and better.
Were you using Modding Tools or ModAndPlay! (Mod installer) ?