Grub Rescue error

I have Lenovo Y560 Laptop on which i have installed Windows 7 and Ubuntu 11.10 as dual boot.Due to some reason i had to recover boot loader using bootrec.exe /fixmbr and bootrec.exe /fix boot,It created one partition of size 198MB named "tets" and my both OS were working fine.

while making some changes in partition table i deleted that "tets" partition and after reboot im getting following error

Error:unknow filesystem grub rescue>

i tried to boot from windows installer cd and but it stucks at "starting windows" so not able to run commands which i have mentioned earliar and tried to boot from Ubuntu 11.10,it stucks after showing following error like.

memory full can't kill anymore process.

Later on i found one tool http://www.supergrubdisk.org/rescatux/ it restored my MBR but now grub rescue error is no more but winodws installation seems to be have corrupted i tried to install windows but installtion does not going beyond starting windows.i tried to install ubuntu 11.10 too but i really wonder why my bootable Ubuntu 11.10 does not start in Live Cd mode which was happening earliar but suprisingly older Ubuntu 9.04 Cd which starts of in Live Cd mode but when i try to install from 9.04 Cd .It does show any existing partitions.

can i use bootable partition magic alternative cd and format linux partitions and windows installation partition?

My System configuration is as follows

Lenovo IdeaPad Y560 is a 15.6-inch display with a resolution of 1366×768 pixels. The laptop which comes with 1.60GHz Intel Core i7-720QM processors, ATI Mobility Radeon HD 5730 1GB dedicated graphic card, 8GB of DDR3 memory, 640GB of hard drive storage three USB 2.0 ports, e-SATA port, D-Sub and HDMI outputs, Gigabit Ethernet, a 6-in-1 digital card reader, Wi-Fi, Bluetooth, standard 6-cell battery

I have very important dat in my laptop.i can't afford to loose it.Please help to start my laptop in any OS and help me