Trapper run the cab in the zip folder by AX3L it will say it will uninstall the previous version but thats fine as it includes the info from that one plus all the reg enteries will be installed. it should ask you to restart your phone.
The 5 files consist of a .rgu file of reg enteries, the modem program, 2 .dll files and a shortcut for the modem program.
havent tested it yet but i believe all you need in the windows folder are the 2 dll's and the modem .exe, you should be able to put the shortcut any where you can get at it easilly although i did not need to set the program up in anyway, finally the .rgu contains all the reg keys needed to be imported, if you do not have the reg keys it will find the wireless data connection on your phone but not be able to configure as you stated.
I hard reset this morning and installed the fix again and then used AX3L's cab which as i said above thinks it had allready been installed. I did this as it saved me from having to re-enter the reg keys, I think his cab actual includes all the dll's and exe files needed aswell but have not opened it up t check yet as it was all done in a rush before work.
You need to delete the tomtom connection on your phone and tomtom then re connect them from the tomtom menu. During setup it will say found the following features on the phone one will say wireless data, it will then try to setup that connection and if you do what i have done twice now it will automatically set itself up. ( you need a good signal as it fails to setup on a week signal )
edit:- AX3L's cab seems to include the dll's but not the .exe