For example I have two computers now, one of them normal laptop 15' the other one minibook 10'.
I want to use this hide my ip2009 on my two computers I've purchased.

Some producers about hideip, they give their product for 3 computers.

Hide my ip 2009 also includes same way.
for one comp 29.95
two comps 39.95
three comps 49.95

How can I do I bought a software but I can not use my other minibook computers?

You can say us buy a software else, but why I have a software but I can not run my other computers?

Thanks

You can run it on any computer you want to, just buy a copy for each computer. Trust me, it's definitely worth it. And, come on, now, it's not that expensive a price to pay for anonymity.