Sony Vaio PCG-FR77J/B need drivers, and US Model Number?

I recently bought this laptop Sony Vaio PCG-FR77J/B on e'bay, and know its a japanese version with windows XP Pro. My question is does any one know what the US Model Number is, so i can download all drivers for it? Sony usa was not of any help for me. The Sony Japan Site was useless for me since i dont read japanese, also could not find a user manual for it, to find out what parts are inside. All i know is this: Sony Vaio PCG-FR77J/B Laptop, intel pentium 4, 2.66Ghz processor, 768mb ram, 60gb hard drive, Screen size 15inches, DVD+/-RW Drive, Windows XP Pro. I dont know where to turn except here, please help.