Title more or less says it all. The game starts up fine and I get to the menu, but as soon as the game loads about half way after I press "New Game" it crashes to desktop. There's a massive error report with a bunch of numbers in it but it didn't really tell me anything valuable
Hardware:
AMD Phenom 9850 2.5 GHz Quad Core.
ATI Radeon HD 5750 512mb
2GB DDR2 Ram
Windows 7 Ultimate, fully updated.
Any help is really, really appreciated.
Here is what the error report says:
======================================= UNHANDLED EXCEPTION OCCURED ======================================================
======================================= CRASH INFOS: =====================================================================
Gothic II - 2.7 (eng), Parser Version: 50
User: James, CPUType: 586, Mem: 2048 MB total, 1077 MB free
Startup Options:
=============================================== CALLSTACK : ==============================================================
001B:005FCC2A (0x00000000 0x11C3E28C 0x11C38034 0x00000002) Gothic2.exe, zCVertexBufferManager::UnlockOpenVertexBuffers()+474 byte(s), P:\dev\g2addon\release\ZenGin\_dieter\zVertexBuffer.cpp, line 393+20 byte(s)
001B:0062723A (0x0135F8B4 0x00000000 0x0135FB30 0x0082E6F0) Gothic2.exe, zCWorld::LoadWorld()+330 byte(s), P:\dev\g2addon\release\ZenGin\_dieter\zWorld.cpp, line 2654
001B:0077FDFD (0x0135FB30 0x00000000 0x0135FBDC 0x0F5BCBA4) Gothic2.exe, oCWorld::LoadWorld()+669 byte(s), P:\dev\g2addon\release\Gothic\_ulf\oWorld.cpp, line 447+13 byte(s)
001B:006C9D26 (0x0135FB30 0x0135FB74 0xFFFFFFFE 0x0135FB74) Gothic2.exe, oCGame::LoadWorldStartup()+246 byte(s), P:\dev\g2addon\release\Gothic\_ulf\oGame.cpp, line 3130001B:00502E1D (0x0135FED0 0x00000000 0x000A26BB 0x0000000A) Gothic2.exe, WinMain()+141 byte(s), P:\dev\g2addon\release\ZenGin\_carsten\zWin32.cpp, line 1054+17 byte(s)
001B:006C92FE (0xFFFFFFFE 0x0135FB08 0x03CFA372 0x0135FCA8) Gothic2.exe, oCGame::LoadWorld()+558 byte(s), P:\dev\g2addon\release\Gothic\_ulf\oGame.cpp, line 2902
001B:006C66B6 (0xFFFFFFFE 0x0135FBD8 0x0082E6F0 0x00000000) Gothic2.exe, oCGame::LoadGame()+246 byte(s), P:\dev\g2addon\release\Gothic\_ulf\oGame.cpp, line 2147
001B:00429BF9 (0x00000015 0x00400000 0x000A26BB 0x0135FECC) Gothic2.exe, CGameManager::Menu()+2345 byte(s), P:\dev\g2addon\release\Gothic\_bert\oGameManager.cpp, line 1474
001B:00425C35 (0x0082F0EC 0x00000014 0x005B03B6 0x0F5BCBA4) Gothic2.exe, CGameManager::Run()+1029 byte(s), P:\dev\g2addon\release\Gothic\_bert\oGameManager.cpp, line 713
001B:007818AB (0x0000002C 0x00571075 0x000001DA 0x00000000) Gothic2.exe, MainProg()+75 byte(s), P:\dev\g2addon\release\Gothic\_ulf\Phoenix.cpp, line 111
001B:00503290 (0x00400000 0x00000000 0x000A26BB 0x0000000A) Gothic2.exe, HandledWinMain()+928 byte(s), P:\dev\g2addon\release\ZenGin\_carsten\zWin32.cpp, line 1169
001B:00502E1D (0x0135FED0 0x00000000 0x000A26BB 0x0000000A) Gothic2.exe, WinMain()+141 byte(s), P:\dev\g2addon\release\ZenGin\_carsten\zWin32.cpp, line 1054+17 byte(s)
001B:007D4418 (0x00000004 0x0000FFFF 0x000000B8 0x00000000) Gothic2.exe, WinMainCRTStartup()+224 byte(s)

Alright. I guess I'll try reinstalling. I should have tried that before posting but I really didn't want to redownload the game due to bandwidth issues. I'll post again if it works.
Also, thanks for the really speedy responses.

You didn't keep the installer? I keep all mine for that very reason.

I have very little hard drive space. Keeping a 2gb installer just in case it messes up isn't really a good idea.