can't believe you had that stash for 10 years and did nothing with them...
what conversion work did you do on the AT-AT driver? you didn't say...
the problem with the AT-AT driver/TIE pilot costume was that the stormtrooper/rebelpilot combo helmet was it was so massive... always looks fine on action figures and in the comics and what have you, but on a person always looks so weird...
Not all of it mate, most of the boxed sets. Loose minis, blisters and ESB boxed set acquired recently.
The conversion work on this one was purely paintjob, though I will add the shoulder plates to this and future drivers and yes they do look very top heavy in costume have to agree.
Snow bases:
(A simple how to). The WEG minis are all solid base (boo!) but given their vlaue I've decided against hacking the bases off and instead dropping them into slottas. This involves tracing round the base and cutting the hole big enough to snuggly fit the mini, then superglued flat in place, with the offcuts glued underneath the base to further secure the mini.
This works well but is time consuming, (thankfully Geronimo does some recessed standard chaffered bases so I'll give those a whirl).
Once the glue has dried, I use a coving adhesive, (basically a finer polyfilla) to coat the base. Once dry this is undercoated grey, then stiple brushed with space wolves gree. I thinned wash of asurmen blue is applied and final work up using skull white.
I still have a most of the WEG figures, one gameshop bought all the loose figures from Grenadier and sold them individually. Can't decide what to do with them. 
If you have any rebels and snowtroopers & probe droids drop me a PM. Cheers
Supplies next:The Commander