Windows 7
unzip win7.iso to x:\win7 copy x:\win7\boot\ and x:\win7\bootmgr to c:\ creat c:\sources copy x:\win7\sources\boot.wim to c:\sources c:\boot\bootsect.exe /nt60 c: //reboot the pc format c:/fs:ntfs /q x:\win7\sources\setup.exe
Windows xp
unzip the ISO to d:\ and ISO to virtual drive cd /d a:\i386 winnt32 /syspart:c /makelocalsource /tempdrive:c