This is something I found from a previous post:
I don't really know what your cracking skills are, so i'll give there general guidelines.
One thing you can do is dissasemble (using IDA pro) the matching patched and non patched version of ezrider. Spot the function where there are differences and note them. Dissasemble the new version, look up for the same functions and apply the same differences...
This won't work as is every time, some times the functions would have changed a bit and you'll have to patch them to get the same goal ... some times there will be new checks and you'll have to track them down ... you can learn more about all this stuff in forums like RCE messageboard
viewtopic.php?f=34&t=25289&hilit=ezrider