It is really annoying for free users on rapidshare to download files from rapidshare, as rapidshare does not allow free users to download multiple files.
Rapidshare Download Accelerator allows you to download multiple files form rapidshare for free, without paying money for a premium account.
I have tested this rapidshare downloader with some files it worked in my case when i tried downloading some files simultaneously from rapidshare as a free user.
You can try, but I cannot assure this software will work definitely, even if you are not able to do simultaneous downloads you can at least use it to download files one by one.
You will need .Net Framework 2.0 installed
Download Rapidshare Download Accelerator