If the plastic binding is partially detached and loosely glued in, then you might be able to pop it loose and reuse them, otherwise plan on replacing them. Bindings are cheap unless they have one of those pre ban elephant ivory bindings (which I highly doubt yours will have). Trying to install the soundboard while retaining the original binding will be difficult because you would need to trim that soundboard to exact size. Linings aren't hard to replace either. A bit of steam used in the neck removal process will help in removing the old lining as well (it will be hard to remove the top without doing some damage to the lining, sometimes they have to be partially replaced). Note also bindings tend to be rather fragile...
So the procedure is, first you remove the neck if you can, otherwise I guess you can always cut the joint fret and remove the fingerboard in that section, but that makes the job harder.
If binding is present, try to remove them without damage but if the binding is new or made of wood, this isn't possible. So take a router with your binding jig (whatever it may be) and route the binding off. You can't save it if you can't get it off in one piece, and you can always replace them. If doing this by hand, then use a Gramil and score around the binding and carefully chisel it off. Note on most guitars, the binding is actually WHITE, and the yellow actually comes from the finish. Get sheets of ABS plastic and make your own binding if you don't want to go with Stewmac. You'll save some money this way.
If you wish to save the top (for the sake of argument), but the top has finish that you want to preserve, insert a heated palette knife into the joint and it will soften most woodworking glue. That was how I was able to separate the top of a Stella that was glued in with white glue, without damaging the top. Try to do this without damaging the top if you can. If the finish doesn't need to be intact, place whatever heating device on the rim (clothes iron or whatever) after covering the finish with wax paper or foil to keep the finish from sticking to the heating device. The heat will loosen the top from the lining but will trash the finish. Be very careful around the blocks due to a larger surface area... generous amount of heat will loosen it eventually but you must go slow and if doing this with the hot knife method, go very slowly and only advance at its own pace (so you do not dig in). Keep the knife hot too, a thin palette knife can't hold much heat and if you try to advance a cold knife, you will damage something. Some moisture will aid in the removal process. The steam from neck removal will help as well but it will trash the finish.
After the top is off, try and see if you can repair the top... I've done it to several guitars and all it took was some tape joining. The top had several cracks and they were repaired with hide glue and binding tape. If you do not elect to repair the top, then you can make a new top, voice it, etc. and then just glue it onto the old rim. You will need to use the old top as a guideline and trim the new top to be exactly the same shape as the old top. The reason is when you put it back together, you need a reference so that you do not distort the box as you are putting it together. Once you did that, you can now glue it back on. Start at the blocks, making sure the top aligns with the side, or binding ledge or whatever EXACTLY. Add a small amount of glue only to that area and clamp. Keep moving and clamping, making sure the side is perfectly aligned with the top. A mistake here will distort the box out of shape! Would be much easier if it was a guitar you have an outside form for, since you can simply clamp your body inside that form and then just close the box as you would a new guitar... It takes me a week to glue the top back to the guitar because it must be done carefully. I work on less than a quarter of the guitar at a time, allowing the glue to dry before moving on so that parts do not slide out.
_________________ Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals. Typhoon Guitars http://www.typhoon-guitars.com
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