To slow the flow of OSC messages, store the most recent value for each parameter using the combine object, but only send it out as an OSC message at the desired rate.
Unlike the join and pack objects, which combine their inputs into a single space-separated list, the combine object concatenates its inputs into a single item with no space in between. This example shows how you can use combine to join things with no space. If one of the inputs already contains spaces, and you want to retain those spaces in the output, you would need to convert the input to a symbol first, using the tosymbol object.
To ensure finding a file (regardless of any File Preferences… settings in Max) you may need to provide the entire path to the file in the hierarchical file system: volume name, folder name(s), and file name. This example shows how you can construct such a full path.