On the OES 2 SP3 client Downloads page, click thelink to download the RPMs as desired.
For details, see Deploying iFolder Server in the Novell iFolder 3.8 Administration Guide.
Follow the on-screen prompts to download the files to a directory on your machine.
Enter cd <location where you have downloaded the files>.
Run rpm -Uvh *.rpm to upgrade to iFolder 3.8.