Thanks to help from an ebay customer I now have a new guide up for the Epson Stylus Photo 1400 (same as the 1390).
http://www.octoink.co.uk/store/pages/Epson-1400.html
In terms of waste counter resets, the only current way to do this is listed at the bottom of the article.
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Printers: (Canon) MP500/830, MX700, iP4000/4200/4300/4500/5200, iX4000(A3) (Epson) C84/86, D88, CX6600, R285/800/1900 (HP) K550, K850, K5400, L7680