Re-Install not working

[Didz]

Got myself in a right mess now. I tried editing the main.pack file to get rid of some of the fantasy units in the game. But when I came to test it the game crashed everytime I tried to enter the Grand Campaign.

Not a problem I thought, as I'd been careful to take a back-up of the file before I edited it. So, restored main.pack from the back-up, but the game still crashed.

Weird I thought by no matter I have a complete backup of the entire Data Folder. So, restored the entire data folder to its vanilla state. Still the game crashed.

Really strange looks like I'll have to re-install. So, I did 'twice' using the steam install option, it still crashes. Now I've gone right back to the orignal CD's I purchased and I'm installing the original unpatched version of the game.

If that doesn't work then I'm screwed, I have no idea why its stopped working.