oh, dear... thank you very much for the answer but i'm afraid i didn't understand almost anything
do you think you could give me a more idiotproof and newbie orientated answer, please?

i'll try to make my question possibly simple:
i'm a 100% of a newbie. using knoppix 3.8 (except for that, windows xp). got a half-year old computer.
i have downloaded flash player and mutella and i want to install them.
can i use kpackage/klick/apt and simply install them without having to worry about anything?