@JohnMaverick
Thank you for your post.
I installed the 'decrypted exe' by simply copy-pasting a fresh exe into the main folder, overriding the old one, exactly like you expected me to do it.
Still this is when not only GP4 could not restore, but now every time I attempted to run GP4 as I normally did, through CSM, now I was getting the "exe error".. I tried restarting GP4, restarting PC, but to no avail, same s ame error... So then I had no option or alternative, but to un-install everything, & try install everything all over again.
So I again commenced re-installation of GP4 all over again, GP4 worked fine from original cd, & then followed by Installing:
patch 9.6,
Gp4.exe 1.02 (NO CD)
Gpxpatch 3.93
I then set compability as Admin to Windows XP Sp (even though I have Windows 7 64bit as OS)
Run the game and exit saving the settings.
I restarted PC, & then continued with installation of ZaZ Tools.
So far so good.....
When I came up to installing a Mod, this is when & where I could not continue, as CSM 1.26 was not responding. Besides not visually seeing mod being installed, I could confirm from Windows Task Manager that CSM 1.26 was not responding.
I tried several times "turning DEP off" through "windows command prompt" again restarting PC, but still unsuccessful.
So to conclude my GP4 can ONLY run in default/original cd , but I can NOT attempt using CSM , for the reasons above.
With reference to your last paragraph where you mentioned Nick, I installed everything in admin mode, so my problem could be as you mentioned with the REGISTRY.....
Itseems I have no other option now, but to un-install everything all over again, & try installing everything again.
Do you recommend any decent Registry Cleaner? I downloaded & istalled one, but nothing seemed to have improved the situation!
Anything more you can suggest please??
Thanks