1. If you really need to add more people, do so HERE
. There will be no significant code change such as the interface and additional functionality you've described anytime in the near future other than an SMF 2.0 upgrade and related material. Since you can already add people at the link provided, it's only a matter of convenience.
2. Oh the horror... I didn't really care about a comma when I made the code originally. Here, come up with something better. You can see how little I cared about this code. Should be self explanatory. Final displayed string is in $hackdata['mods']. You can probably stick the fields in an array and process it via a loop and do something about the comma that way.
3. The Font archive is on the left hand navigation bar now. I forgot about that.
4. Ingrates. First responses are always complaints.