Aleg - The process you describe is exactly the workaround used by some in the Squeezebox and other communities. One has to convert the DSD files (DSF or DFF) to DoP FLAC files using Foobar. As a FLAC file it can then be sent to a DoP compliant DAC. From this the DAC then knows to decode it as native DSD.
It is a bit of a faff but easily doable. If I can do it anyone can. I tried it with some free DSD test tracks to see if it worked with my SBT and Hugo. Which it does. And the resultant playback sounds excellent.
There is a thorough walk through on the AudioCircle forum in the 'How to Use the Squeezebox Touch to play DSD files on a DoP compatible DAC' thread.
Also on the squeezebox forum in the Touch section 'DSD downloads from Acoustic Sounds w/ Touch' thread.
thanks for the referal, I will certainly have a look over there.