Drakeford....you definitely want to start by installing the v1.00 CAB (the first link you list)
As far as the language packs go, you only need to use one if you want anything other than English on your device.
The clock pack is totally optional, there are just more clocks you can place in the five clock files A_C has in the GFX folder.
To really get a good explanation though I would really suggest reading the first, and DEFINITELY the second posts here:
http://forum.xda-developers.com/showthread.php?t=381588