If it's just changes like a different slideshow, icon, colors and logo image then yes, that's possible ...
@mak Good to know, thanks. I've been experimenting with a number of concepts and as soon as I'll have something noteworthy, I'll let you know about it.
... the GNOME flavor is currently the focus of development, ...
I'm aware of that but it makes perfect sense for Plasma to be treated in an equal manner. It is just as much in demand as GNOME.
You can also style ...
I can come up with concepts and I can make graphics but CSS/QSS is probably not my thing at the moment, but one never knows. I just want the installer to look a little better, that's all. An installer is exactly that. It doesn't need to be a wiki or have many slides IMHO, but it must convey a short and to-the-point message:
A user friendly, secure and freedom respecting GNU/Linux OS for your daily usage.
With PureOS, you are the only one in control of your digital life.
FSF-endorsed
That's all it needs to say. But that's just my opinion. This OS is not only targeting people who are already GNU/Linux users but also, if not predominantly, people who are fleeing from Windows and Mac and who don't necessarily know or particularly care about what