In the create disk module, disk preferences tab, the DVD drop down, select 8.5 GB.
Burn a folder, uncheck the burn disk option.
Powerdirector gets the estimate wrong a lot of the time. If you burn a folder then use third party disk burning software, you work around that problem.
It is not unreasonable for a nearly two hour production to need a double layer disk.
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.