I don't think Neuropass will be angry at you if you want to tweak someone else OS what I do is I've get permission first before I do any tweaking to it as long as you didn't upload it anywhere I think you are fine.
I had to get permission for doing my Windows 7 Remix I used a lot of other people work to make this OS. at least I ask before I've upload it to the web......
Devices: Samsung Galaxy S4 ATT
Computer Name: Samsung ATIV Book 8
Processor: Core I7
Ram: 8GB DDR3
Default OS: Windows 7 64 Bit
Hard Drive: 1TB Hard Drive
Graphics Card: ATI Radeon 8770M