Yes the 4983.06 bios will load evox dashboard when the chip is on.
(Default) 4983.06 =
1st D\ default.xbe
2nd C\ evoxdash.xbe
3rd C\ msdash.xbe
You can use the tool that comes with the 4983.06 bios to change the sequence to what ever you like.
M8_16 is for use on the 1.6 version xbox.
M8 is for use on the 1.0-1.5 version xbox's.
You have the retail 8GB hdd correct.
When the drive is partitioned (c,d,e,x,y,z) c holds the sytem files, d is the dvdrom, e is for game saves and x y and z are cache's. After this you are left with just under 2gb of room on the e partition, so you can just hold 2 SMALL GAMES.
Like i said if you want to play games off your hdd you must UPGRADE to a larger one and partition it with a F or F &G (depending on the size on the hdd) and store your games, apps, emus etc etc... on there.
What hdd hack are you talking about ?
Hope this helps.