Moises,
I've got a new beta version that addresses this issue. 'Remember position' now recalls the maximized state, so we should be close to what your needs are. There's also a new feature to set default values for every single option using the 'Global Defaults' feature. See Options->Properties->Global.
To use this feature, just set all the program options you want, including colors, fonts, connection type, terminal settings, etc... Go to Options->Properties->Global and save the default values. Then, every time you start AbsoluteTelnet all you have to do is supply the hostname of your new connection and voila!
You can download it here:
http://www.celestialsoftware.net/telnet/beta_software.html
Let me know how it goes....