help with adding pics to my for sale add

[rmarquart]

i posted my fj for sale and now need to add pictures . i've attached pictures to e-mails before,but how to i get back to my for sale post and add pics ?
please make it step by step idiot proof, i'm a newbie with computers.
thank you

 

[woody]

read the irfanview thread, it's pretty idiot proof