???Avoid reinstalling windows????

So when I transferred my Windows 8 pro license from my laptop to my new desktop it was a severe Pain in the @$$!! After dealing with a nice but very strong accented Microsoft employee for like 45 minutes and had to read him this 50 some odd code line a dozen times ...argghhhh Finally got it done. Now Here I am a few months later and I have two builds ahead of me and 2 people, me and my mother, that have Licenses we want to transfer over to our new hdds via windows install disc and serial key entry.....My question basically is when I install windows 8 via disc on these 2 machines it will install then tell me windows isn't activated and then I'll have to repeat the steps above 2 fold ....I really would love to know if there is a workaround other than stealing it lol jk jk. I have read up on migrating an os somewhat but would that work if the hdd was going into a completely different system????Seems like driver issues etc would prevent that from working, but like I said, I don't know any help would be great!


I know I am in the ssd section so I should clarify that 1 of the new "hdds" is an SSD.