I have fianlly got all my components, cables and software together with a clear night and no moon, this is the result, a set of 16 30s shots of Eta Carina at iso 1600 with the 20d. Darks, stacking and digital development in IP2.75, light noise removal in Neat Image and resize and jpeg conversion in PSE.
Hope you like it - I do

- in fact this is the first nebula shot of my own that I like so I hope you do too. The original is much better detail so I have a crop of the keyhole region at rull res (but the compression has spoilt it quite a bit) all comments welcome.