Hi AlbertP, thanks for the reply and your help.
I've installed LM 13 MATE inside my pendrive just to be in the safe side. I've installed both Broadcom STA driver and the Cedar Trail drm as suggested by the Additional Driver program. The graphics did improve and the wireless light indicator on my netbook is working well. But when i tried to play my videos, with resolution 1280x800 with VLC, it was slow like 1 frame per second! Even in windows, i need to use Windows Media Player and not some other players like VLC or MPC, otherwise the playback will be laggy. I guess its the netbook being so small that it wasn't strong enough to play such HD videos. It has no problems with the video of size 640x480 resolution though.
The other thing is that there is no 3D acceleration in the Cedar driver. I hope that the developer will provide those drivers so that i can fully migrate to linux without looking back.
Linux Mint 13 MATE in Acer Aspire 4715z, Intel Dual Core 1.86Ghz, Intel Graphics 965 Express Chipset Family, 120GB Hard Disk