Glad you got it and got it going, Syclone!
There is no way to brighten the e-ink, but you can get a USB light to use with your PE. Or any kind of light beside it.
In case you don't already know: You can read books that are not in your library (I think Calibre puts them in your downloads file), but if you want to attach notes or websites to your books or navigate using the table of contents you will have to add the books to your library. This is easy to do after the book is opened by the Reader. Just tap the icon at the top of the page that looks like books with a plus in front and you're done!
Have fun!