3-5mins?parang philmusic ah!oooops..
well,sa experience ko, i check my startup items and de-select some items not necessary to run in booting xp.
click, start, then run type MSCONFIG , select Startup.ussualy yung "anti virus" or "auto update" program ang kalimitan cause of delay ng startup.
Don't do it if your unsure of what your doing..may require medium(advance) pc knowledge.