Can I install the reader Wherigo on a Dakota 20 ?

Hello,

I'm new on this forum and I'm french, my English isn't good.
I have a Dakota 20, it's a gps outdoor and I used to do géocaching. New caches appear as Wherigo. The Oregon 450 can read this cache but not the Dakota. My question is if I can install the software who read the Wherigo-cache on my Dakota. Note that I do not have in my possession oregon so I can not try to transfer the software from one to another. But with Google I thinks I find this.

Thanks for your answer.