They have been donated by some company to a charity I help with
-Stephen66515
IF you're working with a registered non-profit or charity (i.e. 501(c)(3) status non-profit or library ), and involved with their technology, you'll want to be aware of these guys.
Microsoft works with this group too. Good source for super-inexpensive software, etc. 

-40hz
Wow...Bookmarked!
If the machines are OEM, you may get lucky with:
C:\Windows\options\cabs
Windows setup files were frequently kept there in the 9x days.
Just a thought.
-Stoic Joker
None of the machines actually have an OS on them

On another note...if anybody has some old tech (Doesn't really matter what it is, or how old it is, just so long as it works) and wants it to go to a good cause (and also willing to package and send), let me know.
I will inform you via PM of which charity this is, their Charity number, and any other information you need

Btw, this is in the UK (Just so any kind donors from Abroad are aware) ^_^