Ethernet Address: 08:00:07:CC:6E:6A
Read, "M.A.C. Address: 08:00:07:CC:6E:6A".
That is not the IP address, that is the hardware Serial number which is occasionally used to uniquely identify a particular device.
The LW 630 is connected to the ethernet network via your basic cable running into the wall jack and an Asante box going into the back of the printer.
The LaserWriter Pro 630 has its own Ethernet port, but it is not an LPR/LPD printer.
1) has it own Ethernet port:
The LaserWriter Pro 630 has an AAUI-14-pin Ethernet port. This port is "uncommitted" to whether it connects via RJ45 (what we think of today as "regular" Ethernet) or some other medium such as coax cable. A twisted-pair transceiver is available on the used market for around US$10. Don't rush out and buy one for this printer, as it will not help with the Snow Leopard problem.
2) is not an LPR/LPD Printer:
This printer uses Ethernet as a "highway" to carry Appletalk packets. ONLY Appletalk packets. It has no ability to communicate via any IP Protocols (such as LPR/LPD) normally used for printing over Ethernet.
You will need a PrintServer of some description to continue to use this printer. The AsanteTalk will not do the job unless you have an older Mac that continues to support AppleTalk-over-Ethernet Printing. One of the magazine articles cited on this and a nearby thread suggest using a printserver such as LinkSys PrintServer that would connect to the printer's parallel port, thus preserving its network printing ability.
Your LaserWriter8500:
The 8500 is completely capable of printing using LPR/LPD protocols. If you connect its RJ45 jack directly to your Ethernet Switch/Router, and can determine its IP Address, you can add it as an IP Printer (instead of an AppleTalk printer) and live happily ever after.