If anyone has the Textpad editor for Windows and would like to use it to edit QL SuperBASIC programs (with user definable syntax colouring etc) I've added a copy of SuperBasic.syn from Laurence Reeves (author of Minerva) to my website. There is a link to it from Laurence's website at http://www.bergbland.info but it's a broken link, however, luckily I had saved a copy of it some time ago which happens to still be on my PC.
To use it, unzip the superbasic_syn.zip and place the file called superbasic.syn in your "Program Files" for TextPad, inside the "Samples" folder. Textpad can be downloaded from http://www.textpad.com
Download it from http://www.dilwyn.me.uk/basic/index.html (near the bottom of the page with the other syntax rules systems).