My opinion is, that tolas patching engine is the BEST ever made (at least i havent tryed better, if you have a better, please anounce it!).

Here my beloved patching-engine is found:
hXXp://www.void.gulli.com/tpe/

(Remember to remove the XX and insert the TT!



And: Its free, and even totally LEGAL to use if you make your own commercial APP and finds a bug and patches it!!!