Ok guys, finally tried crossflashing....
Success....
Now I'm the proud owner of a Lite-On SOHW 1693S (virtually) with Sony DRU-720a hardware!!!
But still the same problem. CDs just dont get recognised. Noticed some improvements in reading and writing though...
The Sony service man says its time to change my lens
dood...Tried searching but many people feel that SONY AW-G170A shud not be crossflashed coz though the firmware is same for a few other drives, the basic hardware of the drive is somewhat different...
Thats waht the folks said, but try checking it out urself anyways
Happy Cross-Flashing