my best idea would be to, upload a mirc.exe, and the files, then, make a mIRC/ folder in your desktop.
put the mIRC.exe in that dir( not the installer, the program itself). (you also need to have registered it, AND have that in the registry.)
make a .bat file, and put somthing like this in it:
run "C:/Users and settings/user/desktop/mIRC/mirc.exe"
there is no way to run it without the box poping up saying that you have X days left to register, unless you register and add that key to your registy.
then you make your scripts, and put them in the directory, and add [scripts] (forgot what its called) n0=path-to-script
n1=path-to-script
ect
hope this helps, im not quite sure it would work, but its worth a try