DRYLOK Questions

i have two sets of ac/heat ducts running down the length of my basement. one set runs right along side of a steel beam. the other main duct is on the other side of beam, but about 4-5 feet away. in this 4-5 feet of space is numerous electrical conduits, and a natural gas line that also run the length of my basement. i plan on a drywall ceiling for my basement with two heights (basically one height where there is either ducts or beams, and another height where i am clear of the utilities). here's the question. if i leave everything as is, i would box in the two sets of ducts and steel beam with one level as i do not think it would look good to jog the ceiling up in that 4-5 feet space. the other option i thought of was to move the one run of ductwork closer to the beam, under the existing electrical conduits. this way the boxed in (low ceiling height) section would be much smaller and the taller ceiling area would be much larger. some questions... 1) is it allowed to have ductwork covering up so much of the utilities 2) would i mess up the balance in my hvac by moving the ducts 4-5 feet over? 3) is this something a diy'er can do. (do you need special tools, can you get all the supplies at the local home depot.) 4) is this way too much work just to eek out a few more inches of ceiling height. :p thanks

I just framed a bedroom in my finshed basement (bi-level style home). I am going to use 1/2" drywall on the walls and I was wondering if someone could tell me what is the rough opening I should allow for a 6' wide bifold closet door. The door we will be using is a white (pre-primed) 6 panel door. I have not purchased it yet. I tried to pull some measurments from an existingbedroom closet and the measurment I got was 6'3" wide. Any suggestions or help woul be appreciated.