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[thepalerider]

Sounds like a corrupted download.
Use a Torrent client next time:

The most common causes of CTD are:
Failure to uninstall any previously installed versions of PR.
This can easily be done via the Windows Control Panel
'Add and Remove Programs' icon, under "Project Reality 0.x".*,
then delete the PR folder to remove any leftover files.
Don't forget to delete the desktop short as well.
PRv.917 uses 2 installers. You must install both 'Part 1' and 'Part 2'.
It is recommended that you restart your system after you install/uninstall programs
to ensure all installed components, files and registry entries are correctly installed or removed.

BF2 not updated to v 1.41 before patching with v1.5
FULL update 1.41
Final v1.5
Some have posted Updating with the
1.5 update
Sometimes does not complete, but looks like it does.
To find your version of BF2
run PR in 'windowed' mode
Look at the upper left corner
you should see
v.1.5.3153-802.0


Incomplete install of 'part 1' & 'part 2'
I believe the PR single/co-op player has been integrated now.

Project Reality v 0.917 uses TWO separate Client Installers and should be installed in this order.
v0.917-part1 of 2

First and followed by
v0.917-part2 of 2
(Part 2 installer should make a desktop short cut.)
If you get any errors, download a new installer from a different source and try again.
Good luck