It depends on what previous version you were running. Copying headers under any case will not work.
If yours is modified to that extent it probably would not be a good idea to upgrade.
It would also be difficult to determine where the issue might be as it could be related to some of the modifications that were made on your end.
Give me a list here of the exact issues and I will see if I can provide you with the sections of code (from the original code that is) where you might want to look to correct them.
Also give me the version of the program you were using that you modified so I know what code you started with.
Thanks!
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