Upgrade NW6.5 sp1 to sp 8

[nanu]

Hi!

Actual LAN is a tree with 3 servers 2 of them NW 6.5 SBS sp1 and a NOWS SBE 2 (SLES):
1.NW 6.5 sp1 - Border Manager (Firewall)
2.NW 6.5 sp1 -, DNS-DHCP, iFolder,
3.NOWS SBE 2 (starter pack) - WEB site with PHP and MySQL, GroupWise, iPrint

I wish to upgrade the first 2 servers from sp1 to sp2 and the BM on the first server to sp5.

At the link Nw65sp8 - CoolSolutionsWiki, I found the NW65SP8.ZIP file.

My questions are:
1. I saw a note about "Evalution for 90 days". Ihope it isn't for the NW65SP*.ZIP file. Am I right?
2. Can I upgrade directely from sp1 to sp8 or I need to install everyone of the intermediate patches?
3. Shall I take care about any other things connected to BorderManager and its upgrade?

TIA

Nanu