Hi,
>>the Chrome Administrative Templates work fine for setting stuff like the homepage, making chrome the default browser etc. but with Windows 8 these same settings seem to have no effect whatsoever
Based on the description, we can run command gpresult/h report.html to collect group policy result report to check out how group policy settings get applied. Note, to collect computer part settings, we need to run the command with admin privileges.
Besides, for this involves third-party product, in order to get better help, it's recommended that we also contact vendor support to ask for suggestions.
Best regards,
Fran