pd, the sunsets lately have been unbelievable. Caught yesterday's at Cave Rock driving from Spats's place to Dookey's place ... tonight I caught it from the Oakland Hills looking out at the SF Bay.
Anyways ... self portraits: timers are fun, and really frigging hard ... I've had a lot more fun doing self portraits with an RF remote lately.
As far as the GND (graduated neutral density filter), it is possible to cheat and do a GND in photoshop but you will not get as good of results as you will with glass in front of the lens, which is what I'm guessing splitter was alluding to. In photoshop it's not an extension or plugin ... you can do it as a gradient layer from white to black and layered in as an overlay. I can show you next time I'm in town.