I frequently (several times a week, sometimes many times a day) print my part or asm at true scale (page setup>scale=100%) so I can get a reality check on the scale of the part. Parts look so big on the screen, and there is nothing like seeing it to true scale to straighten me out. Its also handy to have a true-size print to sketch on top of when trying to solve problems.
The only problem is that, unlike regular printing from the screen which is centered on whatever you are looking at, printing at 100% centers the print on the center of the bounding box of the part/asm. So if I am trying to print the end of a long part, I won't get that end - I will get the center of the part.
A few weeks ago I had a 'duh' moment (I'm getting rusty with the workarounds)...
If you start a sketch, sketch a rectangle that extends past the boundary of your part/asm, and center that rectangle on what you want to focus on, that sketch changes the bounding box so it is centered on the thing I want to print. This workaround is quick, and it works every time (may not be relevent in 2007 because I haven't loaded it to test, but in 2006 it has been a nice productivity booster)
Just thought it might help someone else out - I know I wish I had known this years ago.
Ed