Thank you for your advice Jeff... I will use that option more now that I know of it... it realy made the file much smaller thanks...
@ Pilou
Didn't even know that that is posible, as i said i'm using it only one afternoon and i'm already addicted but will look for tuttorial about it so i don't have to ask stupid questiones...
And one more question... how much does some bether rendering plugin affect my work and should i consider geting one ?