You can embed a Flickr slideshow on a page by following these steps.

View the slideshow that you want to embed. Click on the "share" link near the top-right corner, and then copy the embed HTML code to the clipboard. Paste this into your favourite text editor (e.g. Notepad). It will look something like this:

<object width="400" height="300"> <param name="flashvars" value="offsite=true&lang=en-us&page_show_url=%2Fsearch%2Fshow%2F%3Fq%3Dlondon%2Bbus&page_show_back_url=%2Fsearch%2F%3Fq%3Dlondon%2Bbus&method=flickr.photos.search&api_params_str=&api_text=london+bus&api_tag_mode=bool&api_media=all&api_sort=relevance&jump_to=&start_index=0"></param> <param name="movie" value="http://www.flickr.com/apps/slideshow/show.swf?v=71649"></param> <param name="allowFullScreen" value="true"></param><embed type="application/x-shockwave-flash" src="http://www.flickr.com/apps/slideshow/show.swf?v=71649" allowFullScreen="true" flashvars="offsite=true&lang=en-us&page_show_url=%2Fsearch%2Fshow%2F%3Fq%3Dlondon%2Bbus&page_show_back_url=%2Fsearch%2F%3Fq%3Dlondon%2Bbus&method=flickr.photos.search&api_params_str=&api_text=london+bus&api_tag_mode=bool&api_media=all&api_sort=relevance&jump_to=&start_index=0" width="400" height="300"></embed></object>

The important part is highlighted - this tells Flickr's slideshow Flash application which photos you want in the slideshow. Select this part of the HTML in your text editor and copy it into the "flashvars" box in the form below. You might also want to change the size of the slideshow from the default of 400*300 pixels. Click the "go" button.

Finally, copy the text from the final box in the form, edit the page where you want to embed the slideshow to appear, and paste the text into the editor. You might find this easier if you have this page open in one browser tab/window and edit your page in another tab/window.

All being well, when you save and view your page, you should see something like this: