Is there any clear documentation on how to install a child portal? I keep going in circles.

1. I just need to add a new child portal in a sub-directory- this is just a sub-directory, it's not tied to any domain name

2. My root dnn installation is in www.mywebsite.com/dotnetnuke

3. I am trying to add a child portal in www.mywebsite.com/dotnetnuke/childportal 

4. I keep adding the child portal in the host admin and I get a notification email saying the portal has been set up.

5. But in the notification email the portal website address is blank. What do I do next?

6. Any help would be greatly appreciated

1. I am using version 4.8 and I am trying to follow the instructions here: http://www.dotnetnuke.com/Support/Help/tabid/787/TID/3803/cid/-1/Default.aspx

2. When I do this I get a 404 error when I click on the Create Portal Link.

3. I receive the notification email just fine.

4. But when I go the url it also give me a 404 page not found error.

5. Does it matter that my initial dnn installation is not in the root directory?

1. I see the folder but there is no default.aspx file at all.

2. There is a sub folder called Templates and inside there is a file called Default.page.template

3. But in the root of the newly created portal folder there is no default.aspx file

4. In fact, now that I have checked I can see all the folders of previous failed attempts to create a child portal

5. And none of the folders has a default.aspx file

6. If I go to the public site and type in the full url to the child portal including the default.aspx extension it sends me to the root dnn installation

7. Any ideas?