Download Ventrillo Client version.
Click on the -> in the upper right corner.
Click New and enter a name (this will show up in the ventrillo window) and click ok and then ok again.
Optionally you can enter a phonetic name as well. I think this is used when people have the option turned on that announces who is logging onto ventrillo.
In the main window click the -> next to Server
Click New and enter a name (can be anything), click ok and enter the ventrillo information (Ip/Host and Port) and then click ok
In the main window click on the setup button.
On the right you need to select the correct audio device for input (your microphone) and output (your speakers or headset)
On the left where it says hotkey you can click and then press a key. This will now be your push to talk key, which is the key you need to push to be able to talk. Make sure the "Use Push To Talk Hotkey" option is enabled.
On the botton right you can change the volume of your selected audio devices (turn up the volume of your microphone if others are not hearing you loud enough for example)
On the bottom left you can select the codec (doesnt really matter which, the difference is the quality of the audio, just play with it a little till it sounds alright) and then press the test button and then your push to talk button to test your microphone and output. You have to click the test button AGAIN to stop testing.
You rule!
