I was thinking of buying the AP class 455 vol 2 pack and was just wondering if the requirements (ATS 455 and DTG SN 455) are 100% required.
The fact they are listed on the AP page as "Essential Requirements" would lead me to think "Yes". The word ESSENTIAL sort of gives a clue. Just note if you click on the "more information" links on the AP page you will find it is the Thomson Interactive 455 from steam not Thomson as in ATS Alan Thomson.
Also just wondering.. can i purchase the addon now (and not install it yet) can i purchase the requirements at a later time and then download the pack after I've bought the requirements?
By all means, purchase now in the sale and either download BUT NOT INSTALL it immediately, so you have the pack waiting on your PC for when you have all the requirements, or just purchase and wait to download whenever you are ready. Create a simple account with AP (just email address and password) and you can download all your purchases / updates whenever you like and as many times as you like.