Thanks for answering, everyone. I tried what you guys said, but I still get the same message.
Luchius, when installing I choose the 32bit option. Do you not have the RAM1000MB-64bit batch file?
I know many people have this problem, it's all over the rsbots.net forums too and I haven't found a solutiong anywhere, so please don't close this thread.
After installing the client and trying to run it I get this:
(it's someone else's pic but the message is same, also I get the saame thing...