All good suggestions, but to be fair (unfortunatly) I don't think any of the above would work
I'll openly admit I didn't read the 'welcome' PM when I joined in December, but I found everything out for myself (I love searching for stuff, helps the grey matter).
In my opinion, keep the welcome PM, but send another: with a link to the ''how to upload pics'' thread, as this is very commonly asked question. Also, info about the 30 day and 100 post rule, in regards to avatar, sig, and post edits would be very good. In my opinion, these are the most commonly asked questions by new people.
Hope this helps