Copy risk Ids from standard ruleset to custom ruleset

Hi Gurus

Could you help me with steps by which we can download global ruleset.Presently we have custom rule set.I have to include some risks in custom ruleset.These risks should be copy of some of the risks of Global ruleset.For this reason I am trying to download global rule set.But every time I try to download it with tcode GRAC_DOWNLOAD_RULES it downloads custom ruleset and not the standard global one.

Could you please help me with steps I can download the standard ruleset. Alternatively could you guide me on how can i copy risk ids from standard ruleset to custom ruleset.

I am on GRC 10.1 SP11.

Thanks