Sorry for delay in response been away on holiday.
Adding those two abilities would likely mean modifying the phgstats source.
Not sure what you mean by works on the virfication page but "not in the vbull output" ?
You should be able to change some text and backgorund colors from admin but you probably need to make settings/style.inc.php writeable or edit it manually. For further display enhancing you would be looking to modify the main/phgstats.inc.php where it echoes the outputs.
Once I am updated fully to 3.6 I will verify its working with the latest phgstats version (0.6.9 currently) I dont see why there should be any issues.
Also the phgstats project page is no more and phgstats is currently a sourceforge hosted project
http://sourceforge.net/projects/phgstats/