well i can't find 663 listed at jetway there is 663as and 663aspr
663asultra
i would think the layout of these boards should be the same but check the board with the picture in the manual
to start you off in the right direction this is the manual download for the 663as
http://download.jetway.com.tw/download. ... word=663AS
its a via based board so when your ready let us know and we will point you in the direction of the new via drivers as the jetway ones will be out of date.
don't worry about updating bios at this stage as we don't know for sure what the board number is and that is very important when it comes to bios.
best thing to do if you adding all new drives is to clear the cmos.
or just before you switch the pc on for the first time remove the battery from the motherboard for about five mins then replace it that will clear all settings in the bios and it will load its defaults when you boot.