i recently took off my via chipset drivers off that came with my motherboard and installed the 4.55's. the old drivers were in my add/remove programs and could remove them. these 4.55's are not. i would like to remove the 4.55's and install the new 4.56's, but the 4.55's aren't in my add/remove programs for me to remove. how do i uninstall these? thx!