There are several ways to get pictures posted, so you'll get multiple answers, which will be thoroughly confusing.
I don't know what Sparky's preference is, but there are some negatives to either posting them to the SH server (taking up bandwidth and costing Sparky $) or posting links to pictures you put on PhotoBucket or similar sites. I don't know which would load faster or slow down loading the thread less.
For items in the "For Sale" department, I think posting links makes sense. When your "bucket" is full, we won't suffer when you delete the picture(s) and the link no longer works. OTH, if you post pictures showing your model or showing how you solved a problem, then it'd be better to post the pictures onto the SH server, because it would be there for decades, or when the server goes TU, whichever comes first!
IrfanView is da bomb for a photo reworking freeware. Google it and download from TuCows. There is a PC version and an Apple version, so get the correct one for your machine. IIRC, it's about 1,000kb...quick download, easy to figure out. If you have a problem, email me.

Seve