I am another way to blast the additional levels

Download the level pack to the device ...

Copy this folder to the internal memory of the N900 if you unpacked in windows

In my case / home / user / mydocs /. Documents

Open the X Terminal, type sudo gainroot (if you have installed RootSh) whereupon type MC. If you have Midnight Commander

In one eye looking for our new levels that downloaded the earlier, the second with the windows open directory / home/opt/rovio/angrybirds/data/levels/pack2

Then gradually everything file by file copy to a folder by using the MC / home/opt/rovio/angrybirds/data/levels/pack2 all the extracted files

That's all .. I succeeded for the first time ..

Excuse me if i explain a little understandably .. I will try again