[Obsidian Dragon]

You can't use the samples in Protools natively as an audio track per se. Samples need to be played back through a sampler (hardware or software plugins) and driven by midi. Digidesign recently released "Structure" and now there is also "Structure LE" and "Structure Free." Third party software companies have their own sampler plugins such as Sample Tank, Kontact or Kompact, Gigastudio, etc. I'm not that familiar with what sample formats each support but you should be able to visit their respective website to find out.