If they're partially thawed, you should be able to separate them. Then just sit them on the counter or in a pan. They'll finish thawing quickly. If they're still a bit frosty inside, just throw em on the smoker. They'll be fine. Maybe not ideal, but they'll be fine. I've seen people throw flat out frozen solid racks on the smoker and cook em before.
Big JT's Smokin' BBQ Competition Team
"Oh, I donít reject Christ. I love Christ. Itís just that so many of you Christians are so unlike Christ."