|"wanted to know whether I have to use nlite again or can do it without it"|
I assume your system has a SATA hard drive? If it does, the XP installer won't recognize it. You will have to do one of 3 things to do a clean reinstall of XP:
1. enter the BIOS & change the controller setting from AHCI to "IDE compatibility" mode, install XP, install the SATA drivers, then re-enter the BIOS & change the setting back to AHCI
2. install the SATA drivers from a floppy disk at the very beginning of the XP installation by pressing F6, then following the instructions. Once the drivers are installed, the XP install will continue
3. use nLite to create a new XP disk with the SATA drivers slipstreamed into it.