Well, I have read the article to remove the hardware ID in versions prior to RU5, and it explain how to do it... before the creation of the cloned image. But it is too late for that: the image is done, applied to the servers, and the servers are giving service. The solution has to be something after the damage is done.
The other documents, one is the same that the first option, but I have no sephwid.xml file to delete. The other, is the syslink.xml solution. I have tried that solution, changing the location of the client, but the problem persists, only change the locaction where the client appears/dissapears.
I have been thinking about a possible workaround, but I am not sure if it will work (and not sure how to afford it). If I uninstall the client, remove all SEP files, and all registry entries, and then install again, I suppose that the client will be completely new; the only problem (and maybe the worst problem) is that I don't know if there is a way to remove ALL the files and registry entries. The standard uninstall, definetively doesn't do that.