No, I am sorry. It isn't really just nLite's EULA. nLite modifies many files even if all you are doing is slipstreaming drivers. This is severly against the MS EULA within windows itself. Now sad to say that any non-personal use of this can and probably would be extrememly frowned upon by MS. It isn't that fact really that you are a (Arguably so) non-profit agency. It is the fact that you are using nLite to deploy Windows on many many PC's. nLite and its creator Nuhi caould be held responsible if anything goes wrong without the clause of non commercial usage. The fact of what you removed opens many security holes in Windows and sensitive information could be released. As for wanting to save time there are many applications out there that combined can do most of what you want to achive. Driverspacks as you already know is fine to be used in your situation. Also removing AU and or the security center can be somewhat achived by disabling them during the installation process (Even the winnt.sif file can achieve this).