If you purchased the VPS that comes with Cpanel/WHM, we would be able to offer semi-manage service such as initial hardening to your box, setup the OS with the module installed (such as LAMP stack), tweak and configure the WHM that is the best according to our practise, and other installation request such as CSF, Eaccelerator, suPHP/fcgi, etc.
If the VPS that you purchased does not come with Cpanel/WHM, we would only be able to offer OS installation service.
Re-install of OS is free of charge.