So I have been searching for this on google for quite a while now but I can't seem the find the asnwers so I decieded to ask my questions here. Does CMSimple_XH work with PHP 5.5 if so is there a way to make it reveal all the errors in the code?
You probably encountered a problem with a blank screen, like i had as well. There is a very easy way to fix that.
try this page: http://www.cmsimple-xh.org/wiki/doku.php/troubleshooting
It basically says you should create a file with the name "_XHdebug.txt" and put a number from 0 to 6 in it. nothing else. 0 will debugg nothing, and 6 will debugg everything you can think of. Upload that file in your installation-folder and it should be fixed.
That's it!