You can go to your steam library page, highlight AC, scroll down to "browse steam workshop", click it, then anything you see you have an interest in you subscribe to it by clicking on the subscribe button and it will download and install for you. Within minutes you can use the content. The more you subscribe to the longer you must wait to use it tho, do a couple at a time and see what you like. Way easier than the original rf2 folder manipulations. Good luck.
Sorry, click on dlc from steam, click on downloads on here RD for non ac stuff like tracks and cars. My mind melded rf2 and ac above.