Munka is also good on the others. The real question is why can't he/she do it himself/herself? Why do people always want others to do things while they learn nothing?
I think you are asking about the one who is without who can't be introduced to ToZ, and that's why you wish to do it for them secretly, right?
This is possible. Other question is whether these people would want it at all - to part with their so called bad karma and how they will answer / react (this should be done in secret of course, I mean how their soul will answer - will it really change). They might return to their old patterns after being introduced to the new ones, because so is their nature and conscious will. This might not be purely outer curse. Usually people cling to their patterns, like them and do not want to part with them so easily. These are their path they chose themselves long ago and are not going to just change it around over somebody's good will. Religious choice etc. All this might have been somewhen their own free will. You of course may gently introduce them into other path, but your magic will end one day, and then after they see both paths they still might choose the previous one. I tried this magic so I just share my experience.