You have over 10 posts so you can post pics and links. You can attach images directly or you can use a photo hosting site like photobucket and post links to you picture. If you do that you must paste the IMGcode link so that the picture shows up in the post rather than just the link to it. There is a "paperclip" attach function in the post editor, but it's not as convenient as using a hosting site.
Regarding your reefing situation, dragging your clew line over the tack hook is going to be high friction, so a block at that end will help if you insist on running things aft.
But if you need to go to the mast to handle the halyard and the tack hook, why not cleat/handle the clew lines at the gooseneck as well? You are there anyway and then you have full control of the procedure. (and save some money in the meantime)
Is there any way you can run the reeflines inside the boom? You'll need some sheaves at the aft end and inside the gooseneck fitting to do this, I'm assuming that that's not the case now.....
You could also mount a small single speed winch on the boom to assist in tensioning the clew line during the reefing process. (though if you fully luff the sail to tension the clew you may not need a winch for this.)
If you do a search for reefing on this forum you'll find plenty of info and drawings that may help you. (at the bottom of this page there is a listing of related threads too)
Finally, I STRONGLY urge you to put the vang project to the top of the list. Sailing downind without a decent boom vang is inefficient and potentially dangerous. Make sure you use hardware that will withstand the considerable forces that can develop. The various Harken catalogues and on-line sites can help you with that too. There are also members here that seem to have the Harken specs/part numbers committed to memory