NEW YORK (CNN/Money) - How can I find some diversified mutual funds that have really good three- to ten-year returns with no sales fees and a relatively low minimum initial investment?

—Alan Lehman, LaCrescent, Minnesota

Why, this sounds like a job for the CNNMONEY SUPER MUTUAL FUND SCREENER! It's faster than a speeding bullet, more powerful than a locomotive, and able to leap tall buildings in a single bound.

Sorry. I got caught up in that into to the old Superman TV show from the 50's. I guess our Fund Screener really can't leap any buildings, tall or otherwise. And I suppose it's not more powerful than a locomotive and I'm not sure how you'd even measure whether it's faster than a speeding bullet.

But if you want a quick way to come up with a list of mutual funds that meet your standards, our mighty Fund Screener is a good place to start. In fact, just for kicks I plugged in a few of the criteria you mentioned, just to see what I'd come up with.

Specifically, I screened for stock funds that have: three-, five- and 10-year returns greater than their category average; no sales commission; annual expenses less than their category average; and a minimum initial investment of $2,000 or less. Then I hit the Search button, and voila! I instantly had a list of 42 stock funds that met my criteria.

The fun doesn't stop there. By scrolling down to the bottom of the list and clicking on the Adjust Search button, I'm able to refine the list any number of ways. I could tighten the criteria by, say, asking to see funds with investing minimums under $1,000 (which reduced the list to 14 names), or I could even add new criteria such as funds with risk levels no higher than average for their category (which dropped the list to 10 names).

I also have a choice of ways that I can peruse the list. By choosing the Performance view in the pulldown menu at the top of the list, for example, I get each fund's return for the year to date and the past one, three, five and 10 years, plus comparable average returns for each fund's category so I can see how the fund fared versus its peers. I can then rank the funds by performance over any one of these periods by simply clicking on the column heading for that return period. Pretty nifty.

Even our mighty fund screener has limitations. The biggest is that while it can tell you which funds excelled in the past, it can't tell you which will outperform in the future. No screener can do that, nor can any person (not even the Expert).

So I don't recommend that you keep adding or tightening your criteria until you whittle the fund universe down to one or two funds that you then buy with the expectation that they'll repeat their superior performance.

Rather, I suggest you use our screener — or any screener, for that matter — as a way to identify some fund candidates that you can do further research on. If you click on the ticker symbol that's listed along with the fund names on the list, you'll come to a Morningstar snapshot report that gives you lots more information about the fund's performance, its holdings, its investing style and other details.

Finally, remember that as important as the performance of an individual funds is, what matters most is how the various funds you own work together as a portfolio. Ideally, they should complement each other, with some chugging along to gains when others are being hurt by market conditions. For more on how to achieve this effect, click here.

So go ahead and give our Fund Screener a whirl. Just don't expect that it will turn you into a fund picking Superman.

Walter Updegrave is a senior editor at MONEY Magazine and is the author of "Investing for the Financially Challenged." He also answers viewers' questions on CNNfn's Money & Markets at 4:40 PM on Mondays.