So I have 2 folders set up: G:\sandbox\WUD\x86 G:\sandbox\WUD\x64 I have been planning on using WUD to slipstream updates into my Win7 All-In-One ISO for my new ISOSTICK! , and repeat for laughs on 8, Vista, and XP since I will occasionally use them as well. WUD seems to enjoy crashing at inopportune times, and if I open it back up, it will make me either manually select updates (I'm guessing green = already exists), or re-download all of them! This means, as the months go on, and a couple of updates are added, I will have to figure out what is/isn't already there. If I'm missing something, please enlighten/tease/harass me as you wish =) otherwise, think about adding this in? > Define function to check if update exists, and compare file sizes to see if they match > check if local file exists where update will be saved > if false, then exit function and perform update > else, check to see if file sizes match > if true, exit function and skip update > else, delete local file and perform update > close function