Update: this is no longer and issue and if you have the windows version of Steam installed with all the necessary bits DDO just exatly the same as if you installed the non-steam version of the game.
Bob
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A Steam distribution of DDO has been released, but it does not work in Crossover. In order to play DDO in Crossover you'll need to install using the Pando download client and the "Dungeons & Dragons Online" Crosstie file. The client is available, here ("standard" client is recommended):
http://www.ddo.com/ddosupport/download-ddoYou can also download and use the zipped installer available, here:
http://www.fileplanet.com/202160/download/Dungeons...&-Dragons-Online:-Eberron-Unlimited-Client-(Free-Game)
You'll need to point to the "dndsetup.exe" file within that zip using "select an installer" after opening the Crosstie file.