I recommend you visit this link:
http://oss.kernelconcepts.de/maemo/app-install.shtml

I suggest you use your 770 to browse that page so you can install directly from your 770.

There are some common libraries that are shared among the 3 PIM apps, but once you have clicked on a dependency link, the link should change its color (visited) to indicate you have installed it already.

Keep installing the remaining files and when done, shutdown and restart your 770 just to be sure.

You should now find the PIM apps in a new folder called Extras.