you can try to make a full NOOBS installation sd card / cards, by downloading the wanted or all OS images by hand at an other computer and create a full pre-downloaded OS compilation.
1. download NOOBS 1.3.10 (normal or lite version)
2. unzipp it to a temporary folder
3. download the available OS list
http://downloads.raspberrypi.org/os_list.json to see, that files you need from
http://downloads.raspberrypi.org/ to make your full pre-loaded NOOBS compilation.
4. download the files/folders and put them to the NOOBS/os/ folder (only ".xz", ".json", ".sh", ".png" files of the main OS folder, not of its subfolders, are needed. the marketing.tar contains only the banners (.png files) that are shown at installation time - this tar file you have to untar and put the files to its subfolders - e.g. raspbian/A/)
...
5. if you are finished with downloading and putting the files/directories to their place, you can copy the whole NOOBS to a FAT
formated SD card as usual for NOOBS.
when you now boot NOOBS, it does not need to download any of the OS you pre-downloaded.
in case you have a custom OS, you can integrate it to NOOBS as well by following these steps:
https://github.com/raspberrypi/noobs#ho ... os-version
i made it already for the updated version of OpenELEC (because the default provided one for NOOBS is an old) and for PiPLAY...
it is relative easy to do.