Wasn't able to get the free sign-up to work.
-> Individual Investors -> Already An Investor
-> Investment Guidance And Tools
-> Tools And Calculators
-> Investment Planning Tools ... about halfway down the first screens worth of the page you will see a box labeled 'Investment Tools". The second link in that box is Portfolio X-Ray. The fifth link is Instant X-Ray. You probably want Instant X-Ray.
After you click on Instant X-Ray you will see a page where you enter the ticker symbols and value of the funds that you want to Instant X-Ray. Enter the tickers and values (or percentages) then click the "Show Instant X-Ray" button at the bottom of the page. The answer page shows the X-Ray (it is quite interesting -- looks like a style box that shows the percentages of your portfolio that lands in each of the nine boxes). Just above the style box is a "Save Instant X-Ray Holdings As a Portfolio" button.
Spent a few minutes with it and I was not able to create an account like it said I would be able to.
If you like their tools it might be worth opening an account with $0.01. A while back Fido cut me off from some of their tools after I closed an account there. The rep told me I could restore access to the tools by opening a brokerage account with $0.01.