Change Boat Shop Items

Hi everyone, I'm sorta new at this so if someone could answer a few questions for me:

Can I change what the shop sells in the boat area?
Where would I have to go to make the changes I want? 286xx.hfs?
Could I make the shop sell cash items?
Has anyone tried making price on the cash items 0?
Has anyone tried making the AP requirements low? Does it work?
By doing this, would the Nexon find out or would it just not work?
Where do I remove the SP and AP requirements for transformations?

Thanks for your time!

P.S I want to be able to make these myself so please don't tell me to use something that's already released.

I am pretty sure that stuff is server sided. Even if you changed an items price to 0, it would still server sided be the correct price. What you're doing with any pure hfs file is client modding. It doesn't always effect server side completely.

PS: Adding items or modifying prices or what not would apply to their policy on hacked spawned items and what not, and would thus most likely end in a quick check through the logs to get banned.

All things aside though I'm not knowledgeable enough to get an accurate enough answer from.. Maybe someone who has a lot of experience can figure it out or let you know if its possible. Good luck!