Neil,
From the Help Section:
Adding/Editing an Avatar
Go to My Profile>Profile>Change Profile/Cover Image. You can drag and drop an image onto this page, crop and save your new Profile Photo.
(Its best to use a smallish image size when doing this). The crop tool to frame the image is a bit fiddly but you can play around with it and keep editing until you get what you want.
Adding and Album/Gallery of your builds
Go to My Profile and click on ‘Gallery’, from there you can create and edit your galleries. Please note that images with an apostrophe in the filename won’t upload.
( I would recommend upolading images at around desktop resolution or around 500kb. It is actually vety easy to create a gallery, much better than previously.)
Get back to us if you get stuck.
Colin