Hey everyone,
I think @steveo has posted the most simple way of fixing it. The only way I am aware of is to modify the system properties (http://codekiem.com/2013/02/13/market-helper/):
1) adb remount + adb shell + vim
2) extract the sdcard and do it on your PC
3) use an app (something like "market helper")
I didn't know the property values have such a big impact on the Google Play. I think you can just change it to whatever you like. If we find another name, which doesn't restricts the use of Google Play, we will be glad to change it by default. However, we shouldn't be violating any policies of other commercial products.
BTW: We have a full recovery support by now. Unfortunately, we have found a HUGE issue with the graphics layer, which prevents us from pushing a new release. I hope we can fix it in the next days and make installing OpenGApps a lot easier.