Thanx guys for all your help.
I have found the solution as well. For those who need it, here is what I did. I saved the original adobe pdf file of my class 1( 1.7mb). I then used my "pdf creator" software which I forgot I had (for those who dont want to splash out on the full price of adobe writer) which is really a printer of sorts, selected print and chose pdf creator instead of my canon printer and then save it under pdf creator as a new pdf which somehow ended up as 700 kb i.e. half the size. long winded way but hey...
I'm so useless with this sh1t...
thanx again to all.