OZ1SEJ

I can't orbit! I found this tutorial: [url]http://wiki.kerbalspaceprogram.com/wiki/Tutorial:_How_to_Get_into_Orbit[/url] -but it says I need a FL-T400 Fuel Tank and a LV-909 Liquid Fuel Engine, and I don't have those! Also, I tried to build a humongous rocket, but the pad couldn't support it. Is it possible to upgrade the pad? I've completed quite a lot of missions now, but I don't seem to get any science credit anymore. How do I get more science credit? Best regards, Steen