How to simply texture buildings?

I created a city made of many buildings. I would like to texture itto give it a metal aspect, chrome, with various colours.
For this part, I’am ok! But I would like to add windows thanks to an additional texture!
I found this tutorial, which explains, thanks to this texture, how to use it;

but the difficulty is that the author uses the cycles rendering engines but I would like to make it with the Blender one.


http://www.blenderguru.com/videos/how-to-create-a-city

Thus I wondered which was the easiest and quickest technique to add these windows,fusion mode etc… because i confess that i feel difficulties with it.

I have also to find this sympatic " tile" texture:

http://matrep.parastudios.de/index.php?action=view&material=801-tiles

But finally I did not carry it out successfully because this one is too loud, and makes my PC work slowly.

I would like to arrive at a similar result for these buildings, to alternate with “windows” buildings.

Here a video test:

http://www.fileden.com/files/2007/10/20/1525933/test%20ipnotika%20%40640.mov

And my project:

http://www.fileden.com/files/2007/10/20/1525933/ville%20test%20Pink%20Ipnotik%20MESH.blend

Can you help me please?

Thanks alot!

RUR

PS: Notice that the flickering problem in the city is now solved;, that looks cleaner now!