I just installed an AMD X2 4400 dual core processeor on my computer. I had some issues getting XP to boot after flashing the BIOS to see the second core. But finally was able to do so....however, it boots to my old install of XP on my IDE drives. My newer SATA install isn't recognized unless I disconnect the IDE drives. I went into BIOS and changed boot priorities to make SATA drive primary but as long as the IDE drives are connected it boots to that XP install. Any thoughts? I am using a MSI Neo4 Platinume SLI motherboard.