A former model who campaigns for disabled war victims is not his new girlfriend, insists Paul McCartney, the AP reports. The 57-year-old ex-Beatle, whose wife, Linda, died of breast cancer in April 1998, says he's merely helping Heather Mills, 31, record an album for the Heather Mills Trust. Proceeds will go to people, including civilians, who have lost limbs in war zones. McCartney, 57, even issued a statement on the reports of a budding romance between the two. "I will continue to work with Heather Mills on the recording project, and even though this story (of romance) is not true, I hope it will bring attention to her worthwhile efforts for the disabled worldwide," McCartney said.