I can help you swap out the furniture if you want, but I don't think you'll need the help. The buttstock is held on to the extension/buffer tube with a single screw. The handguards are retained by the delta ring. It can be a little tricky if the spring retaining the delta ring is stiff to remove the handguards by yourself.
A tool exists to aid removing & installing the handguards:
www.bushmaster.com/shopping/handguards/hgd-tool.asp I just use the "buddy method" and have a buddy press down on the delta ring while I remove the handguards.
Pistol grip is retained by a single screw.
WARNING:
The rear take-down pin spring and detent are held in place by the buttstock. Be very careful not to lose these when removing the buttstock. Also, a similar detent and spring are for the safety selector are held in place by the pistol grip. Do not lose these.
Let me know if you want some help.