Welcome to MSFN mate If you are talking about latest Ryan pack, I do not think that it could be the reason because I've tested it many times (I did integrated it only using nLite) without any errors at all. it could be on of the other add-ons ... but when did it start to happen? Which version you are using? But let's think in another direction...I'd like to suggest you a thing that may help... Integrating Ryan pack is more important rather then programs add on, because programs can be installed with switches or any other way while Ryan pack is not. So...you may try Ryan pack only with nLite, and install all your programs with switches using different methods like WPI, or normal .cmd file... and do not worry about if all programs can be installed with switches or not .. because if application has no switch (I doubt) there are many alternatives for most applications, i.e. using Real Alternative instead of RealPlayer....etc In order to make a good CD, you have to test and retest many times in VMware or any other virtual machine. Hope this help !!