asdqwe, as long as you can accept incoming connections, LW will automatically decide if you can become an Ultrapeer (usually on startup, or within 1/2 an hour).

You can see if you can accept incoming by looking in the options->bug reports->Example

Scroll through the info and look for the line

Received incoming this session: true

If it says "false" there's a block in the way, usually because the port hasn't been forwarded through your firewalls and/or routers. You can search these forums for "Received incoming this session" to see many links to how to ask and find info about opening ports.