For those who are interested in testing their software during daytime, below a screenshot of the latest Sky Simulator for ASCOM version 0.1.18 in combination with PHD2. It introduces a cyclic mount error of 20"over 5 minutes and seeing error of 3 ".
With the free Sky Simulator for ASCOM you can test the focuser routine, centering using plate solving, guiding of PHD2 and sequences. It has a build in star database up to magnitude 14 and a deep-sky database. Alternatively you could download deep sky survey images. Available for Windows at SourceForge.