>>>>Thank you so much dear Craig
>>>
>>>I also recommend separate temp folders.
>>
>>why ?
>
>Won't hurt. I had some problems earlier which disappeared after I started using separate temp folders. It may be a coincidence, I am not sure.

I'd expect it to be of the same order of complexity as running 2 instances of one installation - more perhaps if resource files were mixed, but sending them to temp is not reccommended IAC ;-)