first pull out on the pressure relief(located on the lid). this will release any pressure in them. Then pull the lever holding the lid, turn, and pull it out.
There are probably videos on youtube somewhere.
Thanks, found link under FAQs. I was able to remove 1 of 5 lids. The other 4 must be pressurized. These do not have a relief valve. I will purchase kit from local HBS in AM. I will relieve pressure after attaching lines.
You should be able to release the pressure in the keg by depressing a valve on the "in" post. I have ball locks so I can't tell you exactly what to look for but it shouldn't be too hard to figure out.