The first is difficult, and will require many changes to the skin. It will require changing on the buttons to access PhoCO commands. This can be accomplished with the RR Skins Editor, but will be time consuming, and hard. Of course, then to change how the buttons look (say for example, the button now says "PLAY" and you want it to be "DIAL", you will have to change the button in PhotoShop. This is very time consuming)
The second is VERY easy, but will not necessarily look the same as the rest of the skin. Just take a skin that has PhoCO, and that you like, and then go to the Skin folder of that skin, and find the "PhoCo" parts (there will be at least 3 or more that have "PhoCoxxx.xxx" and copy them to the skin folder that you are using. You will also have to modify a button on your current skins Menu (using RR Skin Editor if you want) to start pho co. Read the skincommands.txt file to see what command is needed (or if using RRSkin Editor, it might already be in there) and then you should be done.