Thank you, Frank E, for your help.
I am certainly open and thankful for all and any sugestions, and I may follow yours.
Nevertheless, I have currently installed on my PC several other games (namely, TC2M, Galactic Civilizations II/Dark Avatar, Neverwinter Nights 1 and 2, Rome and Medieval II Total War), that do not give me any similar problems (notwhitstanding the old memory leak of the Total Wars and GC, recognized by the developers and more or less fixed). Certainly no sound issues and no graphic glitches (only the obvious limitations in the high quality options for instance in NWN 2 and M2TW). Of course, this PC also is for work (MOffice, etc), internet, etc., and no problems in that area. Besides, I have never had changed my BIOS options until AACW, and even with my "original" BIOS options (the only ones that I changed, by the way, were AGP aperture and the fastwrites) I had these graphical crashes with AACW.
Even more, also on my laptop (with an X700 and 1 Gig RAM) I have also experienced the same type of error with textures.
So, as I am a persistent guy (some may say stubborn - hope that in a Stonewall Jackson way and not in a J Bell Hood way), I am not completely finished with my struggle. More later on the "textures thread"
