Ok... Just so I make it clear on flashing of eMMC in the N900, please make sure that you have Nokia PC Suite installed. eMMC specifically equires the Nokia Cable Connectivity Drivers to flash it using the N900 PC Suite mode. I have done this myself.

If you are using Windows 7, and flashing through XP Mode, then make sure your XP Virtual Machine has Nokia PC Suite installed on it and when its searching for the device, click USB -> N900 PC Suite.
(This is only for eMMC. Do not forget to flash the FIASCO image without -R first before doing this step)

Dont bother about the dots hanging... Its just that your device is waiting for the eMMC blocks to flash itself. Make sure about the Nokia PC Suite being Installed.