Not directly within Cubase....you will need to load the wav into a soft sampler.
There are some freeware options
I like Shortcircuit (Use v1.1.2) for it's relative simplicity.http://vemberaudio.se/shortcircuit.php
UVI Workstation seems to get plenty of recommendations but I haven't tried it.http://www.uvi.net/en/software/uvi-workstation.html
There are probably other options but one of these should get you started.
i7 email@example.com, 12Gb, W7HP x64, Cubase 7.5.20 x64, Steinberg UR28M, Alphatrack, Wavelab Elements 7.2.1.