Got it, some end of the 32 bit era early 64 bit era laptop is what you have then. Interesting. Kubuntu 18.04, that is very current. It's okay if you don't have Zip or LS120 handy, I wouldn't go get one. So you have an external and internal CD burner that works, and I imagine you have some media as well. I would burn a FreeDOS 1.3 live image and add the bios image and the program to write it with as well to it if you can edit the iso prior to burning it.
Possibly put the programmer and the bios image you want on a CD-R and not worry about that CD being bootable. Burn another CD-R with the FreeDOS 1.3 RC3 live image. You can obviously look at going older than 1.3 too. Even 1.0 will probably be sufficient. The advantage since you have CD-R's of not trying to use a flash drive is that FreeDOS doesn't support USB anything terribly well yet. You may be able to put the FreeDOS boot image on a flash drive trivially since you really don't care about access if the image and the programmer are on a CD where you have an internal one that FreeDOS hopefully supports.
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