Specific frame for movie in new window

hi everyone! just making my first steps in flash and i´ve gotta admit: it´s more difficult than i thought. the big obstacle? actionscript!
so, here´s what i´ve been trying to do (and of course, won´t work: otherwise, would i be here?):
in my main page there are several thumbs that are buttons for bigger images. since they are quite big, i wanted them to appear in a new window.
this new window is a slideshow-kind-of-thing, that contains every picture from those thumbs i mentioned. what i did:
publish the slideshow and place a “getURL” in the thumb:

on (release) {
getURL(“arnes01 fotos.html”, “_blank”);
}

BUT! here´s the catch: i want the first thumbnail to open the html in frame 1 (the big version of that precise picture), and the second one to open that same html in frame 2… the version of the second picture. and so on, so on.
i don´t care if whoever is surfing the page keeps checking out the images in the slideshow window, but i want it to open the correct one when clicking the thumb.
i hope i´ve made it clear, my mother language is spanish (i´m in argentina) so… i apologize for my english.
i tried this thing:

on (release) {
getURL(“arnes01 fotos.html”, “_blank”);
_root.gotoAndStop(1);
}

but it doesn´t work… is it because i´m using getURL instead of loadMovie? i´d like to use loadMovie, but how can i do it in a new window?! i´m such a newbie… thanx for the help! tutorials have been enlightening, kirupa!!