WET and sideloading 70-689

Hi,

just wondering if anyone has seen questions on WET with XP? doesn't work with 8.1 but all the exams books say it does.

Also how much do you need to know about side loading? I know the basic PS command.

found these YouTube video. https://www.youtube.com/watch?v=m6odO8ukYwc https://www.youtube.com/watch?v=pAkjpyST2zY
Thank you in advance.