Have folowed the instructions, including the manual and recently issued additions, but I can't line up the bolt inside the carrier and get the bolt guide pin back in. Looking for someone in the Union or Middlesex County area who can give me some help or who has encountered this problem

Are you trying to swap the bolt from right to lefty

No, but after spending some time with tech support, I think I have this figured out and am posting this so others will not have to waste time. If you have the new design bolt with the captured spring, you can disregard the insert that advises you to insert the firing pin into the bolt and rotate the firing pin counter-clockwise before inserting the bolt into the carrier. You only do that if the retained spring comes out and you need to properly seat it with the firing pin. The manual is screwed up also. You need to insert the firing pin in through the opposite side of the carrier with the 1/2 mushroom head protruding out and position it so that the flange inside the bolt carrier supports the 1/2 mushroom head, then insert the bolt from the opposite end and then the best way to rotate the bolt into the correct position to accept the bolt pin is to use your thumb on the mushroom head and your index finger on the bolt and you can then work the bolt into position so you have a clear channel through the bolt carrier to install the retaining pin. Frankly, the instructions from IWI are confusing and the illustration in the manual needs improvement.

Agreed with the confusing pictures and confusing manual