Hold Shift and then press a multipad. A screen will open allowing you to select the type of multipad you want. Some loop and some do not. There are not a huge number of presets included, so you you may have to make your own. I haven't done that, but it looks simple enough to do.
The presets on Country Ballad 2 are good examples. The piano arp and pedal steel are both really good in it, assuming they are the same as PA900, PA3X and PA4X.