I see some of you people uses this soft to build links, i have a question about how to configure antenna type cause the soft let me choose between some of them but they are all default files that come with the soft and i don't know how to edit this files (omni.ant,dipole.ant,etc).

any help with this would be appreciated.

PD: sorry for my english

for a directional antena you could use yagi.

But if i use yaggy i cant use more than 12db gain, anyone knows where to modify this files?

The authors website has information on how to define additional antenna types.