You don't
need any of that as your Obi300 will function with the default US settings. However you may
wish to have settings which match the local Spanish ones. But there is no ready-made XML file for them.
Regarding the daylight saving, the parameters are the same as for the UK.
Regarding the tones,
https://www.3amsystems.com/World_Tone_Database can provide the frequencies and cadence. The Obi Admin Guide (available from the Docs page at obihai.com) has full details of the tone scripts.
Other parameters such as Caller ID format and Line Impedance you can use a search engine.
When you have all the parameters to your satisfaction don't forget to upload an XML file here for the future benefit of others.