The springs are a piece of cake to do with a spring compressor, jack and jackstands,a Pittman arm tool, your metric tools and a friend. Plan on as much time as you care to spend (3 hours is good). The trunk of a 5th gen is where the harder work really is. Up front is sort of obvious.
NO-you do not need any bushings other than what comes with the shocks. No-you will not need to replace the control arms. You will go into the trunk and remove the nuts holding the anchor bolts for the upper control arm and then you can rotate it out of the way. Reomve the nuts holding the top hat for the shock and you can get it out after undoing the retaining bolt on the lower arm. Up front is a similar story. I will warn that if the parts have never been off the car that you might want to have a set of lower mounting bolts and nuts for the rear-these are special from Honda.
Also remember to cut the bumpstops according to the directions that Neuspeed gives you. I have the "Sport" springs and the front ones are NOT cut but the rears are. I will urge you to consider getting quality shocks (I have Koni) and installing them at the same time as the springs.
You got q's--send e-mail.
Good luck
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Grandpa's toys-modded suspensions and a few other tweaks

'99 Prelude SS - A sweet song in motion SOLD

'89 CRX Si= SCCA/NASA/PDA ITA #99
'03 Dodge Dakota Club Cab (4.7L)-gonna tow
Thanks to KONI, KIRK Racing, Longacre, UPRacing, Summit, Racing Electronics and my crew.