How to change the link for register users?

Thank you very much Maverick, I already solved making a redirect link through the SH404SEF component to the Jomsocial Register page. Than you very much!

I decide do not upgrade because i change the Template of my Component and i don´t want to change it again, take a look: Community Answers Template

[quote]I decide do not upgrade because i change the Template of my Component and i don´t want to change it again, take a look: Community Answers Template[/quote]
I would suggest you to use template overrides if it is only changes related to template. Anyway, that is temporary measure. If you want to take advantage of new features (like multiple file attachments, new UI), upgrading would be right choice.

Retaining template changes is easier if you use tools like Winmerge to compare and merge the changes into new template. You need not search and add changes.

By the way, your template changes looks cool :) .