"Activate AGP" issues

[Ticho]

Since using Search option didn't help, I'm ganlty asking:
What may I do to activate it or play without it?
I switched PCI to AGP in Bios already, but ATI still won't make it run.
(I have ATI Catalyst Radeon x1300pro PCI).
I also heared U can simply ignore that message and proceed, but than acritical error takes place.

OS : Windows XP 5.1 (Build: 2600)
CPU : AuthenticAMD Unknown processor @ 2012 MHz with 1535MB RAM
Video : Radeon X1300/X1550 Series   (6925)

ReadFile beyond EOF 131921417+2/131921417

History: ULinkerLoad::Serialize <- FString<< <- UTexture::Serialize <-
LoadObject <- (Texture LineageMonstersTex.death_knight.death_knight_t00
131921389==131921389/131921389 98983391 131379) <- LinkerLoad::Preload
<- PreLoadObjects <- UObject::EndLoad <- UObject::StaticLoadObject <-
(Engine.Texture LineageMonstersTex.Death_Knight_T00 NULL)
<- UOrcMove::CalculateCRC32 <- UGameEngine::Init <- InitEngine

Any idea what may I do?