Translation of schräg

Thanks a lot. Today and tomorrow are holidays in Switzerland, but I'll do it Tuesday first thing in the morning...please have a look at it and confirm. Where do you want me to place a reference?
The tour started soon and we first visited the ruins nearby, which was a ten minutes drive. A tour guide introduced us to each and every pyramid and told us stories about practically every stone.
For quite a while we were considering to offer a downloadable version of Vocabulix. I could put a popup screen where it says: 'wanna download a Vocabulary Builder or continue with our online lessons?'.