IBM X60 is very legacy PC, very light and have active hard-driver protection but due to the hard driver AHCI mode and no CD-ROM in X60, it is really a nightmare when you plan to re-install the windows.
In fact, you can use the USB disk to install the Windows 7 very easily and fast (there is no driver problem in windows 7 for X60), so the key problem for install the Windows 7 on X60 because how to build a bootable Windows 7 installation
media on USB disk and how to successfully boot it in the X60.
First problem: you can use the UltraISO version 9.3+ version, select Bootable->Write Disk Image from the menu, using write method USB-ZIP+ to build a bootable and workable Windows 7 installation media.
Second problem: press ThinkAdvantage blue key to enter the BIOS setup UI, Config->Hard Driver->switch to ACHI interface and using enable –USB-HDD boot item in the startup menu, save and exit.
Then you will enjoy the most up-to-date Windows 7 experience on the 6 years IBM X60 now, there is no drivers installation headache in win7.