Yes I think I did chmod the whole folder instead of giving the file path. Because in these games the executable file is in a folder and not in the main destination so thanks for that. This must be the reason, I'll check and tell.

In the mean time I discovered that the deb file wasn't installing because I had about 300mb free space in the opt (which I thought was more than enough) but 'driver' needed more than that. So I finally installed 'driver' and its working but now another problem is that its running in small resolution in one corner and not the whole screen. Is this because I have the wrong deb file or do I have to edit something?

Edit: chmod'ed the exact file in pocketchef and it worked without any hassle. Actually its a lot faster then a deb installation and we can also install the game on any destination we want so I prefer this method. Thanks a lot patlak.