I just submitted an update to Development and Extension Guide – Launch SAP® GUI Transaction from WebClient UI which is an extension guide on how to integrate business transactions running in SAP GUI for Windows into the WebClient UI. This new version includes debugging tips as well (should be published this week, so keep a look out). Once again, please keep in mind that this article provides guidance and tips to customers and developers who would like to take advantage of this functionality. At the end of the day, if you require assistance, it will be a consulting engagement. Best of luck.