A SCHEME which allows Hong Kong drug addicts to go to Portugal for rehabilitation treatment is being offered by a group of Portuguese experts based here. Known as the SER Foundation, the voluntary group is going to send the first Hong Kong addict to Portugal for six months treatment next week. The treatment is part of a three-phase therapeutical project initiated by the group to help users kick the habit. Recently formed in Hong Kong, the foundation believes it is easier for an addict to quit heroin if he can transfer to a new environment. The programme consists of a three-month stay in the foundation's Lamma Island centre, a half-year stay in a treatment centre in Portugal, and another stay in the Hong Kong centre until the addict can resume a normal life. Laguna City residents held a rally last night against government plans to move a methadone clinic to the Lam Tin neighbourhood. The residents feared their middle-class estate might be turned into a drug trafficking blackspot. They also questioned the Government's decision to set up near the estate both a methadone clinic and an activity centre for mental patients. The rally, organised by the Owners' Committee, is the latest of the series of demonstrations against the methadone plan. The Department of Health plans to build a 2,000-square-metre clinic at the rear of the Kowloon East Government Offices because the existing one at Tung Yan Street, Kwun Tong, will be demolished to make way for redevelopment.