Thanks Neems211 I read that thread. It is a possibility but due to my requirements less things hanging off my laptop the better on my boat.
I am looking at how I will install my apps next. The laptop will be used for two purposes, navigation and entertainment. The entertainment will be mp3s and DVDs and used when stationary so not at risk of shock damage. I will have a 2.5" HD on USB for mp3s not sure what way to go re films, either bring a USB DVD player and DVDs or rip them onto the HD too. In the days of Marina wireless Internet I'll need Firefox too. As my CF will be protected by EWF I assume it is immune from viruses etc post reboot as long as I don't commit anything? So can I just scan the HD when connected to my home PC and not worry about virus software on my CF?
On navigation there are various regular updates for charts and saved data for waypoints and routes. I tried installing the app on a USB flash key, worked fine didn't seem slow. I can live with killing a cheap USB key once a year

but I think it'll last a while as the updates will never be more than a month. Like a lot of apps though it installs dlls in /System32 and registry entries so the install on the USB key will still be prior to enabling EWF. Benefit is I can plan routes at home and take them with me to the boat rather than having to copy them around. A better way is install the main app on the CF, there's plenty of room, but set the app to use the USB key as a store. Unfortunately the developers aren't that helpful even to a licence holder
I'm running XP Tablet Edition and used XPLite trial to cut footprint down plus some manual trimming. I've not got the footprint anywhere near those reported on threads here. Still I have plenty of room on my oversized CF. That's what you get for buying before you finish your research I guess.
One thing I discovered was that several of my really old 16MB USB 1.1 flash keys show up in XP as fixed media. Anyone else seen this, maybe on a larger capacity one? It would be nice to have the option of a pagefile if XP would allow me and it was beneficial. I read somewher that you can setup hard redirects as in UNIX based OS to point from a EWF'd partition to a non-protected one. Has anyone tried that?
Great community you guys have here by the way.
Thanks again,
Steve.