(See the best response by Ter13.)
Ok so ever since I started working on Dream Maker, I realised there's a type of file that never gets used, which is .dms which it says it's a Script File, however, I have never in the last 5 years, been able to find any tutorial or guide to doing script, or a description of what it is used for,
it looks like a normal Code File, but I'm not sure, does anybody now what it's for and where I can find a good guide for it? Thanks.

it's also used for HTML5 webclient design iirc.
Best response
If you are working in Dreamseeker, DMS has for the most part been fully replaced. If you are working with the webclient, you are going to need to be more familiar with it.
Oh I see, then I guess I won't have need for it, thanks for the quick response.