Windown Xp dual boot

Hello guys !!
today i installed Windows7 in a computer that contain WindowsXp, in the the 2 or 2 first boots (when it still configuring) the system give me the option between loading win7 and an earlier version of windows, and somehow, it doesn’t show that anymore,
i went to the “advanced system setting” and i only found Windows7, i also checked with “msconfing” and also there is only windows7, i tried EasyBCD but it doesn’t fix it, and i think this is happening because both of the windows are installed in the same partition, so apparently the files that allows Windows Xp to load are deleted (in the disk manage i only have one partition and 9mo of non used space)
i looked almost everywhere to find a solution for the problem but all of them are about having two partition where windows7 loader can’t see the windows Xp partition or something like that
is there anyway to fix that ??
(i don’t have windows Xp CD ;D )

thanx a lot