The save.HDR has everything important about your game. The save.MM9 contains the current status of the area that you are in. Anyway, everything important is in the HDR file so I'm going to detail it here -

The HDR file begins with some information about your current location. The first player name always appears at hex offset 1D518 in my files (it may be slightly different if using Telps 1.3 patch). Here's a table of what is in each player section -

Offset /Length/Data
h'0' /17 /Character Name
h'41' / 1 /Level (max=255)
h'45' / 4 /XP
h'4D' / 4 /Current HP (can't be set higher than max HP)

** Variable length issues - Next three fields **
h'55' / 1 /Count of something. Multiply this number by 28 and add the result to every offset beyond this field (including the next two).

h'AB' / 1 /Count of items in inventory. You need to multiply this value by 30 and add the result to every offset beyond this field (including the next one).

h'AF' / 4 X 16/ Sixteen fields which are indicators of items worn. A x'01000000' means there is an item in this slot (helm, ring, boots, etc). You need to add up the number of used slots, multiply by 30, and add the result to every offset beyond this field.

h'EF' / 1 /Voice. Tired of hearing the same stuff? Change it.
h'F3' / 1 /Class. See table 1 below.
h'F7' / 1 /Race -- 0=human,1=elf,2=dwarf,3=half orc
h'107'/ 1 /HUD Picture (player icon) Change your face.
h'11B'/ 4 /Max HP before bonuses (will be recalculated if you train)
h'11F' / 4 /Current Spell Points
h'123'/ 4 /Max SP before bonuses (will be recalculated if you train)
h'13D'/ 1 /Might Stat
h'141'/ 1 /Pure might flag (=1 if you drank the potion)
h'142'/ 1 /Magic Stat
h'146'/ 1 /Pure magic flag (=1 if you drank the potion)
h'147'/ 1 /Endurance Stat
h'14B'/ 1 /Pure endurance flag (=1 if you drank the potion)
h'14C'/ 1 /Accuracy Stat
h'150'/ 1 /Pure accuracy flag (=1 if you drank the potion)
h'151'/ 1 /Speed Stat
h'155'/ 1 /Pure speed flag (=1 if you drank the potion)
h'156'/ 1 /Luck Stat
h'15A'/ 1 /Pure luck flag (=1 if you drank the potion)
h'15B'/ 49 /Spell flags (1 byte for each spell). A '01' means that you know this spell. The spells are alphabetical but spell number 4 was never put in the game. Leave a '00' in the 4th byte. Of course, they won't all work unless you GM every magic skill.
h'18C'/ 4 X 23/Skill Levels table - 4 bytes for each skill - max value = 100.
h'1E8'/ 4 X 23/Skill Mastery table - 4 bytes for each skill (why hunt for teachers?). Allow your player to GM any skill you wish. The Values are : x'FFFFFFFF' = don't know skill ; x'00000000' = know it ; x'01000000' = expert ; x'02000000' = master ; x'03000000' = GM
The order of the 23 skill fields for each of the two tables is : blade, cudgel, bow, spear, thrown, unarmed, armor, dodge, shield, elemental, dark, light, spirit, armsmaster, disarm, merchant, perception, item repair, ID item, ID monster, body building, learning, meditation
x'244' / 0 /Start of next player

Table1 - Character classes
00 - Fighter
01 - Mercenary
02 - Crusader
03 - Assassin
04 - Gladiator
05 - Ranger
06 - Paladin
07 - Initiate
08 - Scholar
09 - Healer
0A - Mage
0B - Lich
0C - Priest
0D - Druid

Now you can do some things. I'd recommend that you stay a Lich but change your picture and voice. Or change to the Scholar and do the Mage quest.