Question about Upgrading hacked forum

I have applied some hacks/templates at my board

1) To remove the moderators column
2) To seperate the categories from each other
3) To put a picture at the category field
4) To put themain image at the top center of my board


when the time comes for an update.. will I be able to do it without problems?

Im really worried

[NTLDR]

You have two choices, re-apply all the hacks to the PHP files after upgrading, or use a compare program to compare the code.

The templates don't allways change each version, if they do you have to manually change them as well.