disclamer:remember to backup your game before modifying or replacing files.
okay so i decided to make a abandoned house retexture for gta san andreas the sky is the limit to what this could be used for.
requirements:imgtool.
how to install:open the img tool open your gta san andreas directory via the imgtool then go to the models folder and locate gta 3 img
then go to edit then click find. 
and copy the following names into the search bar 1:break_f_w.txd and then replace that file with the new one provided.
2:contachou1_lae2.txd and then replace that file with the new one provided.
and lastly 3:ext_doors_old.txd replace that file  with the new one provided.
once you have done that launch gta san andreas and it should work.
enjoy. 
  