PC Login now background change.

Not so much developing a program, but I do have a question about unpacking and editing an iso.

I work for a RMM company and we do alot of password resets on machines, especially when we need to re add a PC to a domain and we don't know the local user accounts. We use the software "PClogin Now" which works wonders and has saved us alot of grief. Problem is that one of our clients complained (why?) that we use 3rd party software to unlock machines and that her PC is "at risk" and now because of the higher powers we can't use the software because it doesn't have our logo and looks unprofessional. We have also experimented with the offline registry editor, but its a bit excessive.

TL; DR If I can remove the image attached/change it to something with my company logo we can use it again.

There is a file labeled splash.lss, but it contained a splash screen for gparted. I've tried everything I can to find the image but can't seem to get it. Here are a list of all the files on the ISO.

choice.txt isolinux.cfg livecd program.mo rd.gz root.dat version boot/isolinux.bin boot/isolinux.bt boot/linux syslinux/boot.msg syslinux/options.msg syslinux/splash.lss syslinux/syslinux.cfg

The syslinux.cfg looks pretty interesting, unfortunately I don't have a whole lot of experience with linux.

[ATTACH=CONFIG]242585[/ATTACH]

To me, this doesn't look like a typical syslinux boot screen (see screenshots in their wiki). If this is the start screen of a program, it's probably buried somewhere inside either rd.gz or root.dat. The former is an init RAM disk (gzipped cpio archive), the latter is probably a squashfs image, but I'm not sure. It seems to be based on Gentoo and use fbsplash (aka gensplash) to display the splash screen. I also suspect that PCLoginNow just uses chntpw internally, so perhaps replacing it with another LiveCD is an option.