Hi Andreus!
I haven't tried any DOS anything on my eDGes, so can't help you there. But I am wondering if you want the smaller Pocket eDGe screen for reading pdfs, or whether you have looked at the bigger eDGe? I love my Pocket eDGe for gaming and carrying around, but prefer my big eDGe for reading.
If you get one (either size!) I hope you'll like it. Meanwhile, maybe someone will actually answer your question.