yup, pls xiaomahe

Open source software is safe to modify.

Depending on the open source license used by a software, it may or may not be necessary to release the source code of the modified to your users.

In the case of GPL, any changes that you make still belongs to you and you can prevent other people from using the portion that you have created as long as you don't distribute the modified program. If you do distribute the modified program, you are bound by the gpl to make available the source code to people who uses your software.

BSD license is even less restrictive, you can go as far as using their source code to make closed software.

its called copy right... when u modify it it is called copy cat

i dont think you modified is a copycat.
copycat means trying to produce/behave something that is very similar to something else

as long u got the valid key, oem is legal
depend on how u use leh

I'd recommend Ubuntu Linux, its free for download and is a complete OS.

Another piece of bullsh*t from you? Open source means its free to modify and free to redistribute.

what open source software do u mean here??

If it is the PGP software, u can go the pgpi.com
for this software you have to ask them to send it to you their source codes.

So far, i only focused on security software like this PGP or GPG (www.gnupg.org)

yeah, u can try linux OS as well, all their software mostly are open source.
i am using ubuntu now.