2gb ISO file convert into 4 cds

hello to every1

thi is vibs from india i have windows vista ISO file which is 2.45 Gb but i dont have the dvd writer only i have cd writer now i want to make 4 or 5 cd from the ISO file the file is bootable so pls tell me is it possible to make 4 or 5 parts of windows vista ISO file becoz i want to install vista.
Tnx
Regds
Vibs

Have you tried downloading it from Microsoft?
http://www.microsoft.com/windows/products/windowsvista/buyorupgrade/default.mspx

bump, I have the same question.