Hi Blue,
On the U joint alignment, align the flanges as per my pic. Just ignore the arrows, I don't know why the arrows don't line up. All simple U joints have instantaneous velocity changes as they rotate. With the front & rear aligned, the velocity changes pretty much cancel out. There is a little more to it in that the front & rear angles should be the same, the pinion angle should match the transmission tail shaft angle, but just aligning the front & rear joints should be acceptable. I just got done replacing the U joints on my BN2 today.
To attach a pic, select add pic when you are in the preview mode. Select the desired pic on your hard disc. Your problem is likely that the selected pic is too large, or the dots per inch too many. The board has a limit of about 150 K for the photo size allowed. You can use a photo editing program such as Adobe Photo Deluxe or some such to set the pic resolution to 72 dots per inch. Then save it as a jpg document which will further compress the file. If the jpg is still over 150 K, you will have to trim the pic a bit, & try again.
D