You can use the embed gadget to include some forms on your site.
Insert>>More Gadgets>>Featured. Look for embed gadget and add it to your page.
Paste the code for your form in the gadget. Set the size for 100 percent wide and 800 pixels high (modify as you want).
Scroll down in the set-up and select Include a scrollbar on gadget when necessary .
Click OK and save your page.