Im not 100% but I dont beleive it can. I thought the same as you with the screen already built in that the software could be added later if I changed my mind but after speaking to the gaffer at my dealer apparentley it cant so thats why I changed my order. Whether he actually knows or just suspects im not sure.
Our system is very similar to that in the 208 so it might be worth asking the same questions in a 208 forum. Their cars have been around a bit longer so there is a much better chance that there is going to be someone that has tried it.
If you do find out please do post back here with the results.
I'll try this when ours arrives but won't be until August so if anyone finds out before then I would be interested. Personally I can't see why they would make a completely different console when software would do the job. It's a bit like a tab or mobile that does multiple things depending on what you load onto it? For example my Galaxy S3 didn't have TomTom sat nav when I bought it but it does now.