Hi J-man and thanks for comment! The truth is that both these shots are more tone mapped pictures than HDR photos

True HDR images should show some details in shadow parts. But as you can see, there is not much details displayed in both pictures

But I like their dreamy look.
HDRI is an abbreviation for "High Dynamic Range Imaging". As you surely know, current digital cameras (neither compact nor DSLR) are unable to capture full dynamic range of the photographed scene. Usually, you get burned highlights or very dark shadows. This is because the digital camera sensors are less flexible than film. But while you can recover some image information from deep shadow parts (at a cost of increased noise), it's usually impossible to recover something from burned highlights. At least not much information and definitely not from JPEG.
So the basic idea of HDRI is to get the overexposed shot(s) and underexposed shot(s) and merge them together in any HDRI program (in my case the
Dynamic Photo HDR). This techniques can be especially useful for small sensor cameras with much lower dynamic range than DSLR.
There is a good reading about HDRI at wikipedia:
http://en.wikipedia.org/wiki/High_dynamic_range_imaging
The usual way of taking suitable shots for HRDI is EV bracketing. Many compact cameras allow EV bracketing in range +-2EV in a series of 3 or 5 consecutive shots in 1/3, 1/2 or 1EV steps. Unfortunately, the AE BKT is the weakest part of both GRDII and GX100 with their maximum BKT range at +-0.5EV. I still hope for a FW improvement in this area, because if there is one particular area where Ricoh is loosing a serious amount of customers, it's definitely HDRI. Many weaker and less powerful cameras than GRD or GX100 are capable of +-2EV BKT. And I'm sure, there is no technical reason of such limitation, because both GRD and GX100 are perfectly capable of taking shots with +-2 EV AE compensation. Basically, the AE BKT is nothing else than just automatized AE compensation
