Well guys you're right , I opted for Rocrail , which does a good job at displaying the image in the block. It can also display the loco ID not sure it it can at the same time though.,
The Rocrail software seems quite flexible, in this area at least. The software , via the loconet feedback from the DR5088's , also detects the loco being removed from a block and placed in another block or just plain removed.