I have made a small mod for ArmA called, ArmA SPR Mod, which stands for "Single Player Respawn Mod"
The readme that I have attached here describes exactly what it does.
I have uploaded a new version of the ArmA SPR Mod today 08/04/2010.
You can download the mod from ArmaHolic:-http://www.armaholic.com/page.php?id=8908
If you use it, please let me know what you think of it here at the ofpec forum.
Rename the .doc file extension to .rtf for best results on the attached readme.