Canoscan Setup Utility CD-ROM missing

Hi, I want to connect my Canoscan LiDE 25Flatbed scanner to my laptop but I cannot locate my CD-ROM disk.  Is there any other way to get that information so that my laptop will automatically install the scanner? i have a canoscan d646u & i cant find my canoscan setup utilty cd-rom anywhere.
is there anything i can do?
PLEASE HELP I have a Canon CanoScan Lide 30 Flat Bed Scanner With USB Interface Cable. Originally it was provided with CanoScan Setup Utility CD-ROM for Scan Gear CS (25MB / 5MB) - Scan Driver,
CanoScan Toolbox(5MB /3MB)- Scanning utility Program,
ArcSoft PhotoStudio (30MB /19MB ) Image Editing Program,
ArcSoft PhotoBase (75MB / 5MB ) - Photo Album Programe
ScanSoft OmniPage SE( 65 MB / 48 MB )-OCR(Optical Character Recognition Programe,
Adobe Acrobat Reader ( 24 MB / 24 MB ) Electronic Manual Viewer
Programe (PDF Manual),
Electronicmanuals for the above software Programe - {HTML (5MB) and
PDF Manuals}
The Whole Programe Suitable for Windows - XP
PRODUCT; Canon Canoscan LiDE 20 / LiDE 30.
i have lost my driver cd... now how can i pair my scaner with my pc ???