Hi All, Thanks for your support; and thanks for Nlite its really superb.... I resolved that issue using the X64 Driver for winxp 64 bit from lsl.com and one more thing i learned that , while we are using Nlite once we copy our XP cd to local HDD, if we selected wrong driver to make our new XP Cd, next time we cant use the same xp (which we had in local HDD) means we have to copy again from our original XP CD to local HDD befor proceding with the correct driver; otherwise previously copied xp will contain wrong drive information, i have experienced this. any how thanks for u all now i am going to do more R&D with Nlite cheers vijeesh