Firstly you have to have a place where you can put portlets for display. Adding a tab to the Overview page is an easy solution for that. You can do that on the system pages, but there can be restrictions on what and where.
If you already have a tab you just go manage My Tabs and if you don't you go to the same place and add a tab for more portlets first.
Then you just add content. I've select the Weekly Detail portlet because it comes out of the box and you can add it on More tab. See that it is there already once and I am adding it the second time on the right side of the screenshot.
Now I've configured More tab to display all the portlets instead of displaying just one for performance and space. The reason is that I can have the two Weekly Detail portlets next to each other to better illustrate that they do have different timescales (Quarters at the top and Weeks at the bottom). The downside of doing it this way is that you cannot configure the names to be different. You could make a copy of the portlet with the Save As functionality in the portlet properties in Administration. In addition to the different timescales you could select different attributes to display. Like you could display ETC for the next few weeks in one and Allocation for the new few months in the other or even add more instances if you need.
This should get you going to dipslay what you want to.