Trouble creating RHEL 6.5 bootable image with custom kickstart file

Hi everyone,

I have a custom kickstart file from a software vendor and I'm trying to package that with a RHEL 6.5 and then attach it to a VM and install RHEL with the settings in the kickstarter file. I'm doing this from a windows PC using an app called InfraRecorder.

I've extracted the contents of an original RHEL 6.5 ISO, placed the custom ks.cfg file in the root of the image and then I create my ISO with InfraRecorder and mount it to the VM however when I boot up the VM I keep receiving this error

ISOLINUX 4.02 2010-07-21 ETCDisolinux: Image checksum error, sorry...

For the boot sector I have placed the files isolinux.bin, boot.cat and efiboot.img.

What am I missing? Hopefully this is the right place to ask this question, I realize I'm using windows to create the image but I figured this has more to do with modifying the Linux ISO and something I'm not doing correctly. I've googled this and searched here in the forums prior to posting this and can't seem to find what I'm looking for. Thanks in advance!