When you download from Rapidshare, you'll most likely have to wait for 15 minutes before you can download again. The only way to skip this is to bypass it, there is a common advice that tells you to change your IP Address. Most Dynamic IP user will have that advantage but not with Static IP User, How if we can change it?
By following these step, you can change your static IP at anytime you want
1. Go to run | cmd, type ipconfig /release
2. Go to Control Panel > Network Connection > Local Area Connection > Properties > TCP/IP Protocol
3. Choose Use the following address
4. Click OK, go back again and this time choose Obtain an IP address automatically
You can now have a new IP address, try it!! Works for me
Last thing: Don forget to clean your cookies