Hello and thank you for your interest in Advanced Installer,
Sorry for the delayed response, we usually have an answer in 24 hours but unfortunately, we cannot apply this rule over the week-end.
When you build the package, all additional files are extracted in the same folder as the installation package (MSI or EXE), so you can use the relative path in the command line.
At installation time, the folder extraction path of your files is the one specified in the
“Download/extraction folder” field from the “Prerequisites” page.
Because they are in the same folder you can use a relative path.
Best regards,
Dan