Here's another way to set the size:
When the windows opens, drag the borders, top, right, bottom, and left to the size you want (almost filling the entire screen). DO NOT use the maximize button.
Now choose File>Close, DO NOT use the X in the top right corner. Go back to the page you just opened the new one from, choose View>Refresh and now click the link again, it should open to the size that you just closed it from.
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Reset New Browser Window Size
Sometimes Internet Explorer 5 "decides" to remember the wrong size for a new window. Whatever you do, you can't seem to get it to remember a normal size.
You can fix this:
Close all instances of Internet Explorer
Start the Registry Editor
Go to HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Delete the value Window_Placement
Exit the Registry Editor
reghakr