Sorry about the late reply but here it is!
I beleave you talking aboiut this patch =
http://www.drivermadness.p4h.biz/main/d ... &file_id=1
First you'll need to back up your entire DRIVER 1 Directory.
If your using Windows XP the best way to do this is buy Right-Click ---> Send To --> Compress (zipped) folder.
Secondly You'll need to copy all the files in the archive which are zipped, (You'll need WinZip or WinRAR or something similar for this.)
Last of all you copy all those files and folders in the main DRIVER Directory.
NOTE: If you don't know where the directory is you can find the short cut to your driver game, right click on it, and then click propertys and then click Find Target.
If your having any more problems please don't hesitate to ask.