How to replace maxis texture

[rg]

I'm going to replace standard white texture to asphalt. Then everywhere instead of the white texture will be asphalt (without use the LotEditor).
And the question - how to achieve it? 

[mightygoose]

you need to find the texture you wish to replace in simcity1.dat then copy and paste the tgi data over to a new dat file with your texture then put it in your plugins. done.

[rg]

But how can I find it? And where paste TGI?