Partigyle Brewing

I'd like to try a partigyle brew. I'm was looking at brewing a 10 gallon batch of a Canadian Ale (2-row, hops, yeast) very basic. How can I do a partigyle brew and end up with 10 Gallons of the Canadian Ale.
What recipe would I get of the higher gravity beer and how much? And What Recipe can I shoot for for the Higher gravity beer?

Canadian Ale:
20lbs 2-row
1.5 oz of cascade at 60
.5 oz of cascade at 5
US-05 yeast

Please help me out with a partigyle recipe that will yield me my 10 gallons of Canadian Ale as the Lower Gravity beer. I'd like to shoot for 4-5% beer on the Canadian Ale.
IT WOULD BE SWEET TO GET 10 GALLONS OF THE HIGHER GRAVITY BEER AND 10 GALLONS OF THE LOWER GRAVITY CANADIAN ALE...
Cheers

There are several calculators that will get you in the ballpark for your gravities.

PG calculator

Recipe formation article here:
BT - Parti-Gyle Brewing

Heres a link to the way I do my parti gyle batches, It may not be correct but it I manage to get a good amount of small beer. Hollis Brewing Company: Parti Gyle Brew-day