In win2k you can manually update time with: cmd prompt
net time /setsntp:"server addy here" no quotes
you will have to restart service to see updated time
here are links & supposedly a free NIST exe for doing this (pdf's)
http://tf.nist.gov/service/pdf/win2000xp.pdf
SERVERS
"1"="tick.nap.com.ar"
"2"="tock.nap.com.ar"
"3"="time.sinectis.com.ar"
"4"="time.deakin.edu.au"
"5"="ntp1.belbone.be"
"6"="ntp1.pucpr.br"
"7"="ntp.cais.rnp.br"
"8"="ntp.pop-pr.rnp.br"
"9"="ntp.ufes.br"
"10"="ntp1.cmc.ec.gc.ca"
"11"="ntp2.cmc.ec.gc.ca"
"12"="time.nrc.ca"
"13"="time.chu.nrc.ca"
"14"="ntp.cpsc.ucalgary.ca"
"15"="timelord.uregina.ca"
"16"="tick.utoronto.ca"
"17"="tock.utoronto.ca"
"18"="nist1.datum.com"
"19"="clepsydra.dec.com"
"20"="usno.pa-x.dec.com"
"21"="ntp.exnet.com"
"22"="ntp.fnbhs.com"
"23"="tick.gpsclock.com"
"24"="tock.greyware.com"
"25"="ntp0.jensenresearch.com"
"26"="reloj.kjsl.com"
"27"="ntp1.mainecoon.com"
"28"="ntp.quidnet.com"
"29"="time.twc.weather.com"
"30"="ntp.cesnet.cz"
"31"="ntp.karpo.cz"
"32"="ntp2.fau.de"
"33"="ntp3.fau.de"
"34"="ptbtime1.ptb.de"
"35"="ptbtime2.ptb.de"
"36"="ntps1-0.cs.tu-berlin.de"
"37"="ntps1-1.cs.tu-berlin.de"
"38"="rustime01.rus.uni-stuttgart.de"
"39"="montpelier.ilan.caltech.edu"
"40"="clock-1.cs.cmu.edu"
"41"="clock-2.cs.cmu.edu"
"42"="ntp-1.ece.cmu.edu"
"43"="ntp-2.ece.cmu.edu"
"44"="ntp.colby.edu"
"45"="utcnist.colorado.edu"
"46"="timex.cs.columbia.edu"
"47"="sundial.columbia.edu"
"48"="ntp0.cornell.edu"
"49"="timekeeper.isi.edu"
"50"="time-ext.missouri.edu"
"51"="bonehed.lcs.mit.edu"
"52"="tick.mit.edu"
"53"="cuckoo.nevada.edu"
"54"="now.okstate.edu"
"55"="time.cerias.purdue.edu"
"56"="fuzz.psc.edu"
"57"="clock.psu.edu"
"58"="gps1.otc.psu.edu"
"59"="wwv.otc.psu.edu"
"60"="ntppub.tamu.edu"
"61"="tick.ucla.edu"
"62"="ntp.ucsd.edu"
"63"="louie.udel.edu"
"64"="mizbeaver.udel.edu"
"65"="ntp-s1.cise.ufl.edu"
"66"="tick.uh.edu"
"67"="timex.usg.edu"
"68"="ntp-0.cso.uiuc.edu"
"69"="ntp-1.cso.uiuc.edu"
"70"="ntp-2.cso.uiuc.edu"
"71"="ns.nts.umn.edu"
"72"="nss.nts.umn.edu"
"73"="chronos1.umt.edu"
"74"="chronos2.umt.edu"
"75"="chronos3.umt.edu"
"76"="clock1.unc.edu"
"77"="tick.cs.unlv.edu"
"78"="tock.cs.unlv.edu"
"79"="rolex.usg.edu"
"80"="ntp-1.vt.edu"
"81"="ntp-2.vt.edu"
"82"="bigben.cac.washington.edu"
"83"="ntp1.cs.wisc.edu"
"84"="ntp3.cs.wisc.edu"
"85"="navobs1.wustl.edu"
"86"="chronos.cru.fr"
"87"="ntp1.curie.fr"
"88"="ntp2.curie.fr"
"89"="ntp.via.ecp.fr"
"90"="ntp-sop.inria.fr"
"91"="ntp.univ-lyon1.fr"
"92"="ntp.obspm.fr"
"93"="ntp-p1.obspm.fr"
"94"="ntp0.mcs.anl.gov"
"95"="ntp-1.mcs.anl.gov"
"96"="ntp-2.mcs.anl.gov"
"97"="time-b.timefreq.bldrdoc.gov"
"98"="time-c.timefreq.bldrdoc.gov"
"99"="ntp.nasa.gov"
"100"="time.nist.gov"
"101"="time-a.nist.gov"
"102"="time-b.nist.gov"
"103"="time-nw.nist.gov"
"104"="ri.ntp.carnet.hr"
"105"="st.ntp.carnet.hr"
"106"="zg1.ntp.carnet.hr"
"107"="time.kfki.hu"
"108"="ntp1.ien.it"
"109"="ntp2.ien.it"
"110"="ntps.net4u.it"
"111"="clock.nc.fukuoka-u.ac.jp"
"112"="clock.tl.fukuoka-u.ac.jp"
"113"="ntp2.usno.navy.mil"
"114"="tick.usno.navy.mil"
"115"="tock.usno.navy.mil"
"116"="navobs1.usnogps.navy.mil"
"117"="navobs2.usnogps.navy.mil"
"118"="cronos.cenam.mx"
"119"="ntp.ewha.net"
"120"="ntp2.ja.net"
"121"="ntp1.kansas.net"
"122"="ntp2.kansas.net"
"123"="ncnoc.ncren.net"
"124"="time.berkeley.netdot.net"
"125"="ntp0.nl.net"
"126"="ntp1.nl.net"
"127"="ntp2.nl.net"
"128"="time.nuri.net"
"129"="ntp.ourconcord.net"
"130"="ntp0.uk.uu.net"
"131"="ntp1.uk.uu.net"
"132"="ntp2.uk.uu.net"
"133"="clock.via.net"
"134"="time.alcanet.no"
"135"="fartein.ifi.uio.no"
"136"="time.service.uit.no"
"137"="ntp.massey.ac.nz"
"138"="ntp.public.otago.ac.nz"
"139"="clock.isc.org"
"140"="ntp1.sf-bay.org"
"141"="ntp2.sf-bay.org"
"142"="ntp.certum.pl"
"143"="info.cyf-kr.edu.pl"
"144"="vega.cbk.poznan.pl"
"145"="ntp.psn.ru"
"146"="ntp.lth.se"
"147"="ntp1.arnes.si"
"148"="ntp2.arnes.si"
"149"="goodtime.ijs.si"
"150"="time.ijs.si"
"151"="biofiz.mf.uni-lj.si"
"152"="ntp2a.mcc.ac.uk"
"153"="ntp2b.mcc.ac.uk"
"154"="ntp2c.mcc.ac.uk"
"155"="ntp2d.mcc.ac.uk"
"156"="ntp.cis.strath.ac.uk"
"157"="bear.zoo.bt.co.uk"