customer ordered a new mobo, cpu, video card and ram and installed them in his machine himself. now his machine won't boot into windows (its XP Home by the way). when i try to go into safe mode it hangs after loading agp440.sys and restarts. i've tried running the recovery console, but he doesn't remember his Administrator password. is there anything i can try other than reloading Win XP?

the motherboard is a Aopen ax4spe, P4 2.6 and 512 kingston ddr400