Despite the sweltering temperatures, it will be Christmas in June this weekend in Old Sacramento. On a 40-city interactive train tour,"Disney's A Christmas Carol" train will be pulling into Old Sacramento Friday through Sunday as a promotion for the upcoming "Disney's A Christmas Carol," which is scheduled to open in November and stars Jim Carrey. Carolers, Christmas decorations and fake snow will transform the train tracks near the California State Railroad Museum into a winter wonderland for families and children of all ages. Those who hop aboard the train will be treated to several different exhibit cars highlighting the making of the movie and featuring props and costumes from the f