I have just taken a couple of screenshots on my mobile phone, and edited them to show you exactly what you need to do, please bear with me, whilst I upload the images and make the supporting text, once I've done it, it should show you exactly what to do. I'm using my mobile only, so you should see what I see
Brb.....
EDIT... HERE WE GO...
I'm hoping this will help.
First, you need to select the UCP - USER CONTROL PANEL. I've highlighted it in this first image so you can see where it is...
Once you are in the user control panel, you will see a few tabs like in this image below.
You need to select the PROFILE tab (highlighted in image below)..
Then select avatar from the side list, again highlighted...
Then either click on display gallery (highlighted) and choose one of the forum stock images (if there are any)...
Or, you can upload directly from your mobile if you click on "choose file" which Is next to "upload from your machine" text (choose file is highlighted)...
The screenshot of the avatar selection screen...
Then on my mobile, it gives me an option of where I wish to select my image from. I chose gallery and I was able to select an image from the mobile gallery.
The image needs to be a maximum of 100 x 100 pixels, no bigger than 16KB.
IF you don't have a pre-made image ready, then you will need to edit one either on your phone or nook, if you don't have a basic art app where you can crop an image or edit an image, then your best bet is to use photobucket. (I don't know the operating system of your nook, if it's windows, then you will have the basic PAINT application, you can edit your chosen image to become avatar size in that. If it's Linux, then you will need to install GIMP, if you haven't got it already) If you are on your mobile, then you will have to edit your image in photobucket IF you don't have an app installed where you can crop, edit and resize images...
if you haven't already got a photobucket account, then you will need to make one. You can't do this in the photobucket app, you will need to go to
http://www.photobucket.com to create an account.
Once you have created your account..
On your nook OR mobile... (if you don't have an app to edit photos/images) just upload your selected picture to your photobucket account and then on the website version, (not photobucket app, also make sure you are on DESKTOP version, not mobile) select the folder that you have uploaded your image to, and then choose to edit the photo, this option is on the blue bar directly above the image uploaded to photobucket.
Once you are in the editing screen, you can crop the image, resize your image, and do other wonderful things to it.
Once you have edited the image to make your avatar, you need to download it back to your mobile or nook.
You can do this either by clicking on the image & selecting to SAVE it, or by choosing to download it in the photobucket app.
Once you have your pre-made avatar on your nook, or mobile, you can then upload directly from your device into the forum software. (the above screenshot, where you select an image from your device)
IF you need ANY of what I've just said clarifying, then give me a shout.
There is already a thread on here showing how to upload and host from photobucket, if you need a tutorial of editing an image in photobucket, give me a shout, either ask on this post, or pm me.
I'll be happy to assist!
I hope this helped!
CV x