Wider Wheels for all

Help please, I'm willing to try and learn

The Older'Classics and Historics are special to many, I love em too, but I have a passion for those bastardised cars of the 60's Modsports and special saloons, I do understand that modifying a body is a tricky thing and you need a 3d program of sorts... well my brain don't stretch that far, (I once accidentally painted a car, but only once though, I could never repeat that fortune) but I can manipulate files and adjust figures, so if anyone can give me pointers on how to do the following I'd be grateful and obviously any successes are available for all as a download.
I manipulate figures and steal sounds form other cars for my own game already, I have a few cars running a wider track and all is fine but like the human race I want more

What I would like...

TVR Griffith Wide GT40 wheels
E-type same
Healey 3000 wide wires (ferrari 275)
427 Cobra perhaps some large rude ones from the 76 Corvette/Pantera
Others...

As I wouldn't be able to do the arches, they's have to do any 'clipping' on the inside of the chassis, I can put up with that.
So what do I need to do for say, the TVR and the GT 40 wheels how do I fit them on?

Adding different wheels to a car isn't all that hard but you need Geditor to extract the files (say from the GT40's wheel file) and 3dSimed to rescale and position them. It's then just a matter of renaming them as an extra wheel style and changing the relevant number on the genstring so the cas file will load them in game.

If you get hold of Geditor and 3dSimed they're not too difficult to learn. I managed it somehow