Saving config files with a question mark in the name?

[cj47]

Config files that start and end with a question mark. Since Windows doesn't allow this, how can one of these files be saved other than using another O/S to do so?

Also, On a SB510x modem, is there a file that controls speed where you can save the file and load it in another similar modem, then change the MAC and retain that speed?