Looks like you have done the hard part of finding the page and have done the cut and paste.
The next step is to use the instant ubb code at the bottom of post page. when you are ready to put in your link, open a new browser, find your page, select/highlight the whole address you want the link to be (http ://******) (don't get the spaces in there)
Then click the url button at the bottom.
it will ask you to input the URL. highlight the http:// part in the dialog box and past in your new url
click ok and a new dialog box will pop up asking you to input a link name (this comes up "web page") type the name of the link you want over this and click ok.
And there you have it.