Hello, this is my first post on this site. We just purchased our first home and there is an office/den that currently has bi-fold doors with a vertical column of glass blocks on both sides. I found a set of pre-hung french doors at my local Lowes and want to install them. The rep there told me that I have to make sure the frame of the pre-hung doors is going to be drilled into a beam or 2x4 and not drywall. I have pictures of what it presently looks like but not sure if we'd be causing ourselves more headache by trying to install them. I do not want to pay for someone to come in to install. Any advice would be helpful. Thanks!