ORIGINAL: sami heimola
R2, I made one test recently. Result was interesting imho. I launched SPWAW in Windows 98 mode (without any virtualbox) via compability menu. I chose 3 german 105 mmm batteries (after than I chose "attack" game against Russia 1941). I set 3 targets. I noticed that all flags I marked as targets, were marked "properly" under 30 seconds each! And leaving menu lasted only 20-30 seconds:). I was amazed how fast "action" went with only changing compability[X(]... Was it only good luck or not[:'(]?
I am a bit puzzled by the delay issue you are experiencing. Are you saying that when you click on something there is a delay before anything happens? Because the usual problem people are having is that the click does not register at all and they have to click several times but there is no actual delay when it does register the mouse click.
I wonder if you have some other issue with your computer that causes the delay. It could be a bad video/audio driver or maybe some installed software that is conflicting with the game. For example many third party video and music playback programs install bad codecs that can mess up the game.
It could even be a power saving option. At least on laptop computers the power saving settings are a common cause for sluggish behaviour in games where it takes several second for the CPU to wake up and give full power. This can be tuned in the power saving settings so that the cpu always runs at 100% speed.

In this screenshot I would change the "Minimum processor state" to 100% instead of 80%. The example is of a laptop computer where one might still want to keep the percentages lower for battery power.
Also in the Windows power options there should be a check box for "High Performance" which should also set the CPU to run at 100%.