[pdftex] pdftex.sty file

[Bill Tottle]

Dear Sir/Madam,

I have downloaded the reduced size Latex package, but 
when I started to write a document an error message keeps coming up.  
It says 'pdftex.sty not found'.  I have tried to locate it on my pc but 
its not there. I have also tried to find it on CTAN but its not there 
also. Have I done something wrong or does this file actually exist 
somewhere and I cant find it?  Please advise if you can.

Hopefully 
yours

Bill Tottle