MapParts: FileExplorer as Template Element with predefined Link/Path

For only project, we use the same folder structure, and similar subfolders like:
ProjectXY/CORR
ProjectXY/GFX

In only Project Folder we use a project overview map (projectxy.mmap) with a map-part-reference to the content from the subfolder (/CORR or /GFX).

Unfortunatly, the link in the map part (file explorer, folder explorer, folder & file explorer) are defined absolute (C:/x/y/z/.../.../.../projectxy/gfx). 

We need to create a foder-explorer as a map part with a relative path (/corr), so he works in only project respectively only folder for any subfolder with the same name.

Is there e possibility to create or edit a map part in this sens, with a fix reference to a predefined subfolder (like "/GFX")?

Thanks
Hitsch