For PHP setup with interworx, there are a few options now.
We have our own PHP repository, it can be used with any hosting control panel. http://rpms.litespeedtech.com/
cloudlinux alt-php added lsphp binary long time again, if you could use mod_lsapi, you should be able to use the same lsphp binary with LiteSpeed.
REMI repo added lsphp rpm a while back.