I have a cool little project I'm doing for myself, I bought a ThinkPad T60 and I'm going to install Libreboot on it. I want it to be themed and look as close as possible to Windows XP. I plan on installing Trisquel and building Cinammon DE from source (they don't have it in the repositories), and then theming it from there. I'm wondering, can I change the bootsplash to the animated Windows XP loading screen?
Yes. There's a few methods. UKI supports boot splash.
There's also these, then there's ways to add a custom bootsplash to libreboot tho the tool there is a bit old, it still has useful information in the repo.
I actually just tried installing it yesterday on Debian, I was able to build everything successfully, but I couldn't figure out how to actually apply the theme. Unfortunately, the developer hasn't written a guide for it yet. Would you be able to help me? Looking forward to your reply!
It's a bit weird; it's not a theme, but an application. You have to run the programs it builds and add them to your startup (i.e. the WinXP taskbar, etc)