The best places to start would be here , here , and finally here (which is actually probably pretty similar to the first one).
As for tips on how to do hacks, I'd suggest adding major ones first and working your way down to smaller ones. Big ones that require a lot of changes are more likely to install "properly" on relatively unmodified boards; if you have a ton of little bitty changes made, you have to do more manual searching for things, because even a single character difference will break the "Find" command.
---Skorpion
Don't put that signature in your mouth! You don't know where it's been!
Who's Online is probably the biggest. And I believe it's got it's own installer thing too, so if you plan on having WoL, definitely do it first.
Other than that, basically just look at the instructions for installing it. The longer the instructions, the more changes are typically required, thus, hacks with long instruction sheets should be done before hacks with short instruction sheets.
---Skorpion
Don't put that signature in your mouth! You don't know where it's been!
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i have a board that is version 
