To add a direct link-
Go to Admin CP -> Settings -> Navigation Manager -> click on the drop down menu for Blogs (Add Link)
Now fill it out like this...
From the Product list choose "IFRAMER" mod.
Give it a title
The Target URL will look something like what is there... you can get it by going to actual iframer page in your browser and copying the last part of the URL.
Save it and the link will appear along with the other links on the sub-bar.
If you prefer to make a drop down menu with multiple links then start by going to Go to Admin CP -> Settings -> Navigation Manager -> click on the drop down menu for Blogs (Add Menu)
Create a menu...
Then go to Navigation Manager -> click on the drop down menu for the new menu (Add Link)
And then follow the same instructions as above to add links to the menu.