You have control over the theme of Password Reset Server (PRS),
depending on how much effort you want to put into it. To
change the logo, perform the following steps:
Go to the PRS Application folder on the web server and find the Themes folder, and make a copy of "PasswordResetServer -
Default", and rename the copy to something you desire. This new name
will be used to identity the theme when you go to PRS configuration.
Going into the new theme folder you just renamed, you should find
an "images" folder, in it you should find "prs_logo.png" This is the logo
that is display on top left of the page. You can change this image to
anything you want, but I recommend you preserve the original dimension,
which is 300x50. Same goes for the background, which is based on the "bg.jpg" image.
This should do it if you wanted to replace the logo and background. If you need further
customization, you can go to the Style folder and tune the CSS file to
have PRS look however you want.
The last step is to set PRS to use your new theme. You can do so in the
app by going to Administration -> Configuration, and you should find
the theme with your personalized logo from the Default Theme drop down
list. Select it and choose Save.
NOTE: Once you have copied an existing theme, you can customize any element of PRS whether it be CSS or images by changing the CSS or images in your new theme.