Spell Checker Hosted Upgrade Issue - where to put Cust ID?

Hello,

I just purchased the Hosted version for $150 to remove the banner ads.
They sent over a special customer id to integrate to the editor initialization code, but I am not having any luck on where to place it. I have tried "config.js" - placed it i the custom area where you can modify the toolbar/colors. Didnt work.

Any ideas?

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Here's the instructions from Spell-Checker.net

WSC plug-in for CKEditor 3.0. Hosted version

http://wiki.spellchecker.net/doku.php?id=3rd:wysiwyg:fckeditor:wschck3hp

Encrypted customerid is required to perform migration from free to paid version. Encrypted customerid is provided in the registration email sent to customer after sign-up for SpellChecker.net account.
Please modify the page that contains CKEditor

Following string of code should be added to the editor initialization code:

CKEDITOR.config.wsc_customerId="<customerid>";

Example

<script type="text/javascript">

CKEDITOR.config.wsc_customerId = "1:ua3xw1-2XyGJ3-GWruD3-6OFNT1-oXcuB1-nR6Bp4-hgQHc-EcYng3-sdRXG3-NOfFk";

</script>