After a bit more research in the nature of overLIB (the thingy-ma-bob which controls the little purple popup) - I've found the answer. Here it is for future reference:
In order to control the positioning of the Popup window relative to its anchor (ie the hyperlink) - go to components/com_comprofiler/plugin/user/plug_cbmenu and open the cbmenu.php.
On line 922 you'll find following code segment:
[code:1]
."', CENTER,CLOSECLICK,CLOSETEXT,'"._UE_CLOSE_OVERLIB."',WIDTH,350, ANCHOR,'cbAddConn',ANCHORALIGN,'LR','UL');";
[/code:1]
What we're interested in, is the UL (right at the end). This stands for "Upper left" and denotes which corner is actually in contact with our point of reference/anchor.
As you'll remember, my problem was, that the window was opening too far left - it was impossible to click "submit" as this part of the form was "off the screen".
By changing UL to UR (upper right) - the window opens to the right of our anchor, instead of left. Alternative variables are also LL (lower left) and LR (lower right) - this makes the popup open above the anchor.
Hope this helps somebody
cheerio,
anna
If you're interested into personalizing these popups even further - here's a couple of links:
www.bosrup.com/web/overlib/?Command_Reference
and
www.bosrup.com/web/overlib/?Plugin_-_Anchor