Urgent help !!! wrongly mkfs to /dev/sda1 insted of /dev/sdb1 data deleted

[Vinod Nadiadwala]

Hi, guys,
I had a working Ubuntu 9.10 with Windows 7 installed, and i was writing an
image of IPCOP (www.ipcop.org) to the USB drive incorrectly, i did mkfs on
my primary partation i.e. /dev/sda1

now i am trapped in situation, i was trying to write and usb-hdd image of
ipcop on USB Drive, while doing so, i have given following commands

1. mkfs.vfat /dev/sda1
2. e2label usb-pen
3. zcat filename > /dev/sda1

* now the stupid thing i have done, is given /sda1( My HDD ) instead of
/sdb1 (USB Drive), it has successfully loaded IPCOP bootable on my primary
drive, and my laptop is not working now.

Laptop Partation Info:
/dev/sda1 - NTFS (Windows 7 Prof)
/dev/sda2 - NTFS
/dev/sda3 - EXT4 (Ubuntu 9.10)
* i had dual booted Windows 7 with Ubuntu.

Current Partation Info:
/dev/sda1 - vfat (IPCOPBOOT)
And all other is free space - 320gb

** now i want to get my partitions & data back, if anybody have idea about
how to get rid of this situation please share.
** The good thing i have done, is that, i didn't tried to install anything
on the drive after this happened, with hopes that i can get my data back
*** So i guess that it can be recovered but confusion is that, which data
recovery software to use, and for linux or windows, as i had my data on NTFS
filesystem and currently there is Free Space and EXT4 partition.
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