I thought about this after seeing few guy's post's asking about it.
Login to your PhotoBucket account and choose edityour photo
Choose the phoro you want to resize
Go to adjustment then resize
Here are my recomendation regarding the resizing
I prefere to your save and replace rather than same as new file
To post your picture in the forum follow these few steps
Sorry, it’s one click not double clicks
The picture after resizing
Hope that will help youposting your pictures.