And if you modified any of the resources found in external patch files (of which I recall QFG1VGA had plenty), you'll need to do something about them too... external patches take priority over ones in resource.000.
Yes, RESOURCE.MAP will need to be patched as well, since I had to convert it from SCI1.0 to SCI1.1 to be compatible with the new interpreter. As for the external patch files, they'll just be removed, as the upgrade will incorporate them internally.
Here is my work on the patch, with the new drivers and interpreter. You just need to drop in the original RESOURCE.000 and RESOURCE.MAP. However, the built executable fails to work, giving the "unable to open source file" error, even if the original unaltered resource files are in the same directory. Am I doing something wrong?