hi guys thanks a lot for all the suggestion, but my problem still persist.
when the problem occured ,at that time my hd has 2 xp os(1 in the primary fat32 c:,the other
in the first partition of extended which was ntfs D

all other partitions in the extened are
fat32.
after the problem occured,in panic i boot from 98 cd
delete,recreate & format the primary partition using fdisk.
then loaded 98 os on my primary.then boot into 98 run the xp cd & upgradeed it.
then again boot into the primary xp & run the xp cd to load xp into the ntfs partition.
during installation i delete & recreated the ntfs partition & formatted as ntfs.
now after all this the 2 os are running perfectly ok
but my original problem(xp cd not booting) remains as it is.
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now as per the suggestion given by most of u.
i boot from the win2k cd go through the recovery console, it detected both the os.
go through the first one, issued the following commands in this order
chkdsk c: /p
chkdsk d: /p
fixmbr
fixboot c:
fixboot d:
but the problem remain as it is.
i have also tried the chkdisk utility within xp.
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my last hope lies with spinrite.
i have just downloaded spinrite v.6.0 (cracked)
& created the bootable cd using the *.iso file
by the way raven is this version ok .
as for the low level format,
i am a bit reluctant to delete my extended partiton as it contains a lot of data
& my friend harddisk doesn't have that much free space.but i will have to do it anyway
but i need some time.
in sprinrite, i don't get any option for llf
it has 2 options
level 2 for recovery
level 4 for mantainance
if i choose 4 then it says it will do a surface check.
if i do this surface check data will remain intact or will be lost.
roughly how much time it will take for entire 40gb?
should i do it for entire harddisk or partion by partition??
will it be possible to pause & resume?
any other tips&tricks regarding spinrite will be highly welcome.
i will post further progrsss as soon as possible.