HELLO umm i just brought 500ml's of NULON ULTRA COOL CONCENTRATED RADIATOR TREATMENT. now the directions for it says add 100mls to every 2 litres of clean soft or demineralised water. it also says if cooling system is dirty or rusty first clean with nulon r40 radiator flush and clean. well my questions r do i have to buy that r40 or can i just flush it the way mouce has told in the how to section. and once its all flushed do i put the 100mls in the radiator first or do i put the 2litres of water first all can i do either. is it possible i can just put the whole 500mls in wouldnt it be better. and cuold i just use the water form the garden hose instead of the deminerised water wateva that means lol. thanxx hope som1 replys as i plan to do it tomorow even tho its starting to scare me cos i aint to sure wat to do even tho i read mouces how to like 100 times still scares me for som reason. b4dn xxxx