I've written a project where, in the PRV notation, there are too many notes in one measure. I would like to spread them out by half a measure without affecting the project tempo (and without rewriting the track.) How do I do that?
 
Thanks!

Spreading them out would technically be a rewrite.
So essentially you're saying something like
I want to walk to the corner but I don't want to move my legs.

It's only one measure. Just fix it with the draw tool or smart to be the way you want it.

Actually, this isn't one measure. I wrote about twenty measures of PRV notation at the wrong tempo. I want to maintain the tempo, but the measures tick by too slowly.
 
I'm only an amateur, so I guess the best way to explain it would be that I'm using the wrong "time signature"? The 4/4 is correct, but the measure count it too slow, so I wish to expand my work across a proper measure count.
 
How would I go about doing that?

Grundberg
...the wrong tempo. I want to maintain the tempo...
...the wrong "time signature"? The 4/4 is correct...

Some clarity is desperately needed here.

The Fit Time function? I don't really understand the problem.

Grundberg:
 
You might want to try using the "Set Measure/Beat to Now" command.  "Shift-M" in Sonar X series allows you to position the Now time and set the Measure and Beat.
 
I use this all the time for live sessions for both MIDI and audio recording.
 
Hope this helps,
Paul

I think I did what he's talking about. I wrote a midi song and started with an arbitrary note length. And used that length to add new notes. It still lined up with the grid(by luck I think) but was not in time with the metronome. So I set the tempo I wanted and hand moved all the notes to their correct places. It took a while but I saw no other way to do it. First thing I do in a new song now is set the tempo and get the note lengths to what I want that match the grid.

change 1 measure than copy/paste the rest.
unless there are changes through out.
https://www.youtube.com/watch?v=ruAnAPR6-hQ

EDIT: oops...ignore this post, I misunderstood the OP's issue
 
Maybe this will help?
http://forum.cakewalk.com/Double-the-speed-without-speeding-up-music-m2921743.aspx#2926675
 
EDIT: actually rather than make you read the whole thread...this is what I wrote in it (and Jeff Evans resolved)...if this is not the problem you're having then please disregard my suggestion-
More than a couple of times I've hastily started recording an idea (trying not to lose the idea) and somehow counted it (say a 4/4 metronome) as playing 1 and 2 and 3 and etc as opposed to 1,2,3,4 and had to start the whole thing over so that the instruments later added work out in the PRV and/or staff....so I really am hoping what Jeff is talking about would fix my goofs that will inevitably happen again. 

Insert a Meter change to 6/4 for that one measure (then back to 4/4 after it)?