I followed the next steps:
1. Download the plugins sdk from trunk, and the portal from the trunk also.
2. Change the liferay-versions property to 6.2.0 in liferay-plugin-package.properties.
3. After some security problems, I found out what other lines are needed in liferay-plugin-package.properties' security-manager-get-bean-property:
4. Run an ant build-service and an ant deploy, then copy the new war into the deploy directory of the trunk version portal.
I see the portlet in Add -> More -> SpedOne.
You can add to the page, and it appears well.
So it seems working on the trunk, but I think, it should be backported to 6.1.20, because it is the latest version for our users.