Thanks for all your help charang. It was a nice thing I already had FDM installed. Was trying with downloads so faced the following problems.
There are 3 different resolutions on the site
1. 800*600
2.1024*768
3.1280*1024
Now the website links differs according to the resolution. All wallpapers are available in 800*600 resolution and few in 1024*768 and fewer in 1280*1024
So links according to resolution go this way for the same wallpaper
800*600 => *media1.santabanta.com/full/indian celebrities(f)/amrita arora/amr75a.jpg
1024*768 =>*media1.santabanta.com/full1/indian celebrities(f)/amrita arora/amr75a.jpg
1280*1024 => *media1.santabanta.com/full2/indian celebrities(f)/amrita arora/amr75a.jpg
Now I can use star in front of 2 because it will download the wallpaper in all the resolutions which is not needed.
also the last character can be either from a-z but only one amongst it.
I mean it can be like amr75a, amr12v, amr3h
Now if i use a wildcard for character, and a wallpaper doesn't exist, then it downlods a blank file of 4040 bytes.
eg
amr75a is there so amr75b-amr75z will be blank
Final issue, I have to do it for every category. I know it wont be possible to do it for one and all because of complexity. So, I am okay with it. Just help for the above 2 probs