R script autoload at startup

Hello;
I'm now using mainly R for windows, mainly because I'm writing a 
tcl/Tk interface for some people, and I've got two questions. I'm an 
absolute beginner with tctk or tcktk use under the R GUI.

1) Is it posible to create a shorcut that launchs the R GUI and 
automatically reads the "source code" of the tcl/tk script to also 
launch the tcltk interface?

2) Is the RGUI programmed with tcltk? In this case, is it possible 
for an user like me to create a menu entry at the R GUI to call the 
source code in this R/tcl/Tk script?

Any of the two options would be very good for us.

Thanks and best regards,

Javier