Hi dont know how similar the older design cooler is and its a totally different card but ..... http://www.youtube.com/watch?v=jExfK6_zZRU
Thats a Twin frozr III but it might help you get the gist of it
EDIT oops just noticed he uses toilet paper to clean, I would recommend a lint free cloth/coffee filter
Darn! I didn't know it was that easy. I thought I'd have to start taking apart the cover, fans, and heat sync to get to it. It all comes apart from the 4 bolts on the back! Also, I was afraid there might be several thermal pads on the VRMs, etc. that I'd have to deal with. Excellent video. Thank you. I have been searching for a half hour and couldn't find one.
Yes, I always use coffee filters too for my CPU/cooler. And I see he used MX-4 in the video. That's what I was planning on using too.