Mckinlay:Select is a very good package (from my perspective). Improved networking, (Omniclient, DHCP etc). Improved Paint and Draw (Dynamic areas and jpeg support improved interface) Internet suit. Improved filer (thumbnail option).
The problem from your perspective is that (for licensing reasons) your system cannot be used to load it without buying RO4 first. Castle are in the position to relax this restriction, if they and ROL so desired. (providing select will work on an old filesystem).
I wonder how many extra customers there would be for select if it worked on systems without RO 4?