to Enable windows 9x/Me support for original Doom 3 version 1.0 (6659308 bytes):
1. download any 'Hex Edit' utility
2. open Doom3.exe with it
3. go to offset 00374F1E and 00374F1F
4. change and save it as follows:
00374F1E: 45 ----change to---->00
00374F1F: 78 ----change to---->00
5.Run and enjoy it
If your majesty think that ID Software don't deserve your money because they made Doom 3 running on Windows 2000 or Windows XP and that's the reason why you have a pirate , illegal, cracked or whatever Doom 3 version follow the next steps:
1. download any 'Hex Edit' utility
2. open Doom3.exe with it
3. find the next string 'GlobalMemoryStatusEx'
4. replace the 'Ex' with 00,00 in HEX MODE!!!
5. save it
6. Run and enjoy it
BUT....
With the next coming patch it may be changed to make you buy and install the most unwanted , slow , onstable, useless, onsecured, wasted resources, not for home use Windows XP/2000 operation system because ID Software is owned by Microsoft hahaha or well.... are they just stupid enough that can't figure out your physical and virtial memory status without using an API??????- i doubt it very much!!!!!!!!