yea what Version PS2 is it??? FF10 is a like push PS2 to the limits type game isnt it??? and some of the Old PS2's like the V1, V2, V3 etc etc dont like getting pushed to the limits now after about 4 years of use
Maybe adjusting the Laser would help - http://www.richspsxparts.com/psx2.html
They used to have a forum that had lots of guides, looks like its gone 
George W Bush -
'...more and more of our imports are coming from overseas.'