iaStor.sys Problem

[.naVA]

Hi, I've got a Sony Vaio VGN-AR41E and I have intergrated my drivers via nLite, but every time I boot from the CD, it says 'File iaStor.sys could not be found' I've used 3 CD's trying this, I tried it on my Laptop, and on my XP Pro box and it says the same thing, I've also got the latest version of nLite, can anybody help me please? Thanks in advance