Edir upgrade quick question I hope

I have about 18 Netware 6.5 SP8 servers in my tree running Edir 8.7 along with a few new OES Linux running Edir 8.8.. I would like to upgrade the Netware servers to 8.8 if possible. Can I simply download the Edir 8.8 patch and install it via NWCONFIG on the Netware servers or is there more involved issues to be aware of ??..These netware 6.5 servers have been updated all along with service packs and therefore do not have the 8.8 version on them. Can someone point me to the appropiate download file I would need as well as any installation instructions or "gotcha's" that may be floating around ??
Thanks so much in advance