Game not installed properly

I recently reformatted my c: drive and PES6 was on the d: drive. I know that there must have been some registry files I removed, I've had this problem in PES5 too, reinstalling solved the problem. But the problem is my DVD was lent, does anyone know how to bypass this problem without reinstalling? Editing some registry keys?

Paste to notepad, modify installdir and installed languages (to 1, like lang_ on my file), save as .reg

Wow thanks for that help but I didn't quite get all of it. This is what i registered but its not working still:
---------------------------------------------------------

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\KONAMIPES6]

[HKEY_LOCAL_MACHINE\SOFTWARE\KONAMIPES6\PES6]
"installdir"="D:\Pro Evolution Soccer 6"
"lang_e"=dword:00000001
"lang_f"=dword:00000000
"lang_g"=dword:00000000
"lang_i"=dword:00000000
"lang_s"=dword:00000000
"installfrom"="I:"
"code"="YOUR CODE"

[HKEY_LOCAL_MACHINE\SOFTWARE\KONAMIPES6\PES6\1.0]
-----------------------------------------------------------------------
YOUR CODE? what code?

O i got it to work u need \\ strokes in the install dir and code is ur serial no. Thank you champ!

No problem
I'm glad you managed

Thanks man , have the same problem .
Now i can get going again with my great PES 6
Cheers !!