Wickes Cos. announced that it has entered into an agreement in principle to acquire the 28-store Homecrafters Warehouse chain, which is based in Birmingham, Ala. . . . Burbank-based Shamrock Holdings said it completed the purchase of 1,234,800 common shares of Enterra Corp. for $9.50 per share. Shamrock now owns about 23.5% of Enterra . . . According to Automotive News, Volkswagen of America may build upscale Jetta models in its Pennsylvania plant, which already produces Golf subcompacts.