i haven't had much luck getting the same quality out of Crisco from a hi-ratio recipe. I can get a nice flavor, but it doesn't have the same mouth feel and the smoothness as hi-ration. So can you do it? yes. Will it be the same end product, no.
FWIW, if you can order hi-ratio from a distributer your price for it may be lower than Crisco out of the supermarket. You might get a local restaurant to order it for you if you check around. I get a 50# box for $78, which puts it at $1.56/lb. Crisco at my Safeway in the 3 lb tub goes for $2.63/lb. I know that paying that much at once doesn't seem like a cost savings, but if you can split it with a friend or two, or even keep it in a cool place (you can deep freeze it too, i think i read), it will last you for a good, long time.
If you do use it in the SugarShack recipe, be careful with adding as much liquid as it states. The HR is denser and requires more liquid, the Crisco less.