Windows 7 - How to change(repair) 0 second boot of windows 7 ?

Hi there!
I am newbie here at sevenforums,
I'm dual booting ubuntu and windows 7.
Actually I'd installed ubuntu in windows 7, so my main/default OS is windows 7.
In hope for making Ubuntu as my default OS, I made a minor tweak in boot options today.
I made changes in 'Startup and Recovery Settings'(System Properties) in windows 7.
But what silly thing I did was changing the time to 0 sec, as I thought It hardly matters, I'd press arrow keys while booting and the timer will stop, but It didn't happen so.
So technically I have lost my connection with windows 7, almost.

Can anyone here guide me for changing that 0 sec boot option through Ubuntu or BIOS?
I mean there must be some terminal commands for it.

Curiously waiting for your reply,
Regards,
Ganesh


Oh btw here are my some system specifications :
Laptop Model : Sony VAIO VPCEA33EN
OS : Windows 7 Ultimate, Ubuntu 11.04 Natty.


Plz check out this link first, it'll help you in understanding my problem :
"www.lytebyte.com/2009/02/05/how-to-change-the-default-os-boot-order-between-windows-7-and-vista/"