Gift Certificate on 1.3.4sp3

Hello Guys,

Do we know if we could use the gift certificate on the version 1.3.5 on the 1.3.4 sp3 version?

I was willing to implement that as I have been asked a lot. Could anyone help ot guide me how to implement?

I already copy all addon folders in the test shop, created the language entries, navicat the 2 gift certificate tables and added the link on the order sidebox on the administration but the addon tabs are not showing on the Addons page.

Anyone can help? I appreciate folks