Protobuf-net with Compact Framework 3.5

Question

I want to include Protobuf-net in my binary serialization application. My application is written in Vs2008 for CF 3.5. I'm not sure which one is the best to use?

protobuf-net r282.zip has a CF35 version protobuf-net r480.zip has nothing like this

I would like to use the latest (and largest) version, but don't know which one to use.

Thanks in advance