Transfer the roast to your crock pot.
Sprinkle dry soup mix over the roast, and then pour the two cans of soup into the crock pot. Throw in the fresh rosemary sprigs
Cook on high* 7-8 hours or until roast is tender and falls apart easily.
I know it seems like a long time to cook 7 to 8 hours on high in a slow cooker, but I think roasts are more tender and fall apart easier cooking them on high for that long. Every slow cooker is different though, so if you feel like cooking on high for 8 hours would burn your meat, then by all means, cook it on low. You know your slow cooker better than I do.