Your problem is caused by cold precombustion chambers. My SDL is also sluggish until it reaches operating temperature. I'm easy on it until it's warm because the transmission seems a little unhappy when it's cold. I'm not complaining... it's a high mileage powertrain that is still providing faithful service. It drive gently until it reaches 80°C and then I give it a good run through 3rd gear. After that, it's ready for just about anything.

An ALDA tweak will probably help you out a little bit. But keep in mind that the problem is inherent in the design of these engines. Remember, a diesel engine will make more power as it gets hotter.