If you put height in the iframe then you don't need the iframe script.
Your problem with the automatic height lies on EQDKP Plus from what i can see.
Actually I do since if I try to use width="100%" in a simple htlm page without the use of the script, it wont expand and autoconfig to the users resolution. I'm forced to use a specific number like width="1600" but then this won't work for people that run under that resolution. So your script did help out in the end ^^
PS. Yes its EQDKP Plus that is the problem but at least we have a temp solution that works now ^^