I can't speak for other GB leaders but for my GBs it's OK to "right click" and then click on properties so you can link to the badge. If you like you can have the badge hosted by a service like Photobucket.
Irfanview is a free program,that amoung other things, will allow you to resize pics. You can then upload this resized pic to your photo host so it can be placed in your sig. If you would like I can resize your pic. Just email it to me and let me know what size you want it.