If you are a system administrator you don't have really to "teach", all you have to do, is to install the programs they need and show them how they work. I don't need to teach how to install and move around on linux, thats your job, not them.

To make a company change there minds on windows to linux, its easy... all you have to say is... "Linux its FREE" you don't have to pay licences, all the software is "FREE", don't have to pay licence either.
These days linux is getting more and more easy to use, and have great support.
You can make network between Linux and windows. And yah... you can install linux on a laptop, and linux have a vast drivers support.
Linux have alot of software to backup, he even have TAPE DAT Support, i have a Linux server with TAPE DAT that backups all the data i need. Check on the google or in a linux comunity for "dd" command on linux, you will find it most interesing.

I know its hard to start on a new O.S, especily one that have a reputation for being hard, and only great minds and hackers use it. But you will find thats not true, even my girlfreind that doen's know anything about computers, and have a minimal use in windows, she uses my linux to chat, surf on the web, play games...etc.

She uses because i have configured the system, but this was what i was telling you, this is the job of a system administrator, you install and configure and move around the system, the users only have to know is how to work with the programs.

Good luck on your quest to windows ehehe
any questions about linux, i guess you can post on this forum. But there are other forums out there.
i could point some, but im afraid that will not allowed here... im not sure.
you can allways google up for linux comunity and forums
ehehe