OK. But note you aren't going to change the driver file name!
Rather you have to find the driver file, and edit the file to change the device name which appears
inside the file (that's where Windows gets the name it displays to you)
i should be a file with an .inf extension
Also to see the file you must first change your settings to
"view hidden files"
Next, you need to find the right .inf file. It might be simplest to use Windows search to look for the text Micronas inside of all the .inf files in C:\Windows\inf.
If i recall you need open Control Panel->Search Options (Or similar name) to modify your options.. but would have to post details later as i don't have a vista machine in front me right now... but that's the idea.
Find the .inf containing the Micronas device name string it. That's where windows is getting the name. Then edit the name string. BUT make sure you edit the right name (especially if you find multiple occurences.). If you want, might be best you just attach the .inf file you find to a TechSpot post so i can see it first.
and point out the right string. (be sure to back things up before you attempt this tho!)
/* EDIT */
Actully, here;s an example of what you should find inside the right .inf file. See this example
Code:
PCI\VEN_11C1&CC_0C0010.DeviceDesc="AGERE OHCI Compliant IEEE 1394 Host Controller"
the string between the quotes is the name that would appear in Device Manager. You will find and can edit the device name in the .inf file when you find it