Pavel,
That email is for our design services group. You want to use the product's support page:
http://www.logicpd.com/support/
Just use the "Ask a Question" interface and our Technical Marketing Engineer will get you moving from there.
As far as making your FPGA look like a flash drive, that's interesting, but might not work the way you think. In that case, you would be calling in the WinCE USB host stack into play which would involve at least these three components:
* USB host controller driver
* USB stack driver
* Generic USB Mass Storage Class device driver
By default, WinCE will want to treat that as a block device and lay some sort of file-system over the top of it. So, unless your FPGA is going to emulate a FAT file system (or something similar), I think that would be a difficult path to try and get what you want.
A Stream Interface driver is almost certainly what you need. In that instance, applications open up the device as if it is a regular file and perform operations on it such as; read, write, open, close, I/O Control, etc.
--mikee