Could someone please tell me where I can find the Portal 2 Sixense MotionPack DLC for Razer Hydra to actually DOWNLOAD it? Supposedly it's only on Steam, but if I go to the page here:

http://store.steampowered.com/app/660/?snr=1_7_7_151_150_1

There doesn't seem to be any button ANYWHERE to actually download it! I bought a Razer Hydra and it's supposed to include a free copy of this version of Portal 2, but I have to download it.

try: steam://install/660

All that does is redirects me to my search engine and tries to search for that text, which returns results to the steam website but not that page.

A quick google search turns up this:

Razer Hydra Portal 2 bundle
If you purchased the Razer Hydra Portal 2 bundle, you can find a key code in the box. Enter that key code into Steam->Game->Activate a Product on Steam... This code will activate a copy of Portal 2 and the MotionPack DLC

[Razer Hydra without the Portal 2 bundle
Some Razer Hydras are now offered without the Portal 2 bundle for a reduced price. If you have a Razer Hydra and already own Portal 2, send an email to p2motionpack@sixense.com to request a Portal 2 MotionPack DLC code. Include the serial number from the bottom of the Hydra base in your request. It's the numbers and letters following "S/N"