I think most people use rapidshare to download all they stuff that they want. One problem with rapidshare is when you want download multiple file, you have go through the same page again and again. You have to choose between premium and free option although you are a premium user. To download multiple file at the same time, I use Flash Get.

Let go with the tutorial.

Step 1: Download the Flash Get.

STEP 2: Install Flashget when you have it installed you should see flashget icon in your task manager

STEP 3: Highlight some rapidshare links that you want with your mouse and copy. Now flash get should auto pop up a download box with all your links in there, click on ok

STEP 4: After you have clicked ok you will see another box come up and you will see a section that says login to server and check that option. Put your rapidshare premium account login and password. Save them as default.

STEP 5: Now,you can just click ok and your download should start if you have done it. You all set from now and you only need to go to the forum highlight all links and copy. Download manager should comes up.

I hope this tips will help you.

Update(December 20,2008)
Things About Computer (TAC) has tutorial on how to set up FlashGet to download from RapidShare (RS) How To Download File on RapidShare Using FlashGet. This tutorial include picture to make it easy for you to configure FlashGet.