poxy signatures

had mine removed the other day, havnt got a problem with this. i understand the rules for size.

but what i dont get is how to comform to them.

i since made my picture smaller than the 550x150 allowed but the KB (what ever that means) was like 80,000 and you only alowed 25 i think?

does anyone know how to make signatures "PF legal", sort of a idiots guide for people like me who can only just type with 1 finger. as theres lots of threads regarding sigs, but none explaining it in simple terms, (ps i dont have photoshop) and what is a KB or a bytes?

or can someone just sort my pic for me.

thanks