Mickey, no problem (BTW the name was given to me by my fraternity brothers, who with great acuracy forsaw my failing out of that college) The SP1600-T gasket should just lift out of it's seat by hand. Getting one back in can be a little tricky, sometimes they try to 'buckle - up' and need to be worked back around. Sometimes you can get away with just turning the original one over and reseating it (if only a small area is bad). I don't know much about Baq but it seems some of their products will foam. (The majority of folks here don't 'like' Baq - for a few reasons, the biggest being that it's simply not as effective as chlorine, and it really costs $$). I would strongly suggest taking a good read through the Baq section of the forum (and see Ben's read on them at poolsolutions.com).
The skimmer 'weir' should only go down enough to allow sufficient water to enter the skimmer body (this helps with entrapping surface debris - the whole idea behind a skimmer) and should float back up to entrap the collected debris when the pump is off.
Your earnest interst in caring for your pool should keep answers comming to you from the various members here. In time you will learn enough to be able to care for your pool and provide answers to others who may experience the same questions that you have!(We are a 'give and take' community: learn when you can and help when you can). If I can be of further assistance, never hesitate to ask!!
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