Xp service pack 2 video drivers

hi,i,m face problem with my system is that
i recently change my os with windows xp service pack2
all drivers are work well with mother board softwares given by the operator but the video drivers are not installed with driver softwares.
please suggest me what software will be help from this problem
computer model: compaq-presario CQ3140IX
ram:2gb
mother board: phonix manufaturer