The embedded viewers supports scrolling with the wheel and changing level and window. Please try it out. Zoom is coded but disabled as a bug in Conquest can crash the server for non-square images.
I added error handling because some people had some trouble getting it to run.
To test it, locate your web server cgi-bin folder, and create a subfolder, eg. test. There put the contents of the attached zip file. You will also need to add dgate.exe (windows) or dgate (Linux) to the test folder as well and adjust the path to acrnema.map in cgi-bin/test/dicom.ini.
Then (for windows)
should start the new interface. Please provide feedback.
edit: updated the files on 6 December 2015 for 1.4.17d compatibility