I don't believe Microsoft Has released Direct X 10 or 11 for Windows XP. There was a hacked version of 10 for XP on-line but it caused more problems than it solved IIRC. . . =)

Ahh right. My bad. I just recently returned to Windows as my main OS so I have to recall certain idiosyncrasies that occur in the different versions :D.

I sent the author an email asking him to read this thread and try to help us, hope he will be able to tell what's up with all this flickery mess.

Thank you, Videotraf! For some reason I didn't think about this solution. %| Shame on me!

As there's no reply from Stephen Orlando, I decided to use twitter, and send a message to him through this damned thing. Feel free to bug him, too: https://twitter.com/#!/robit_studios

So, yeah.

Oh. Great. :/

Well, as my investigations shown, game needs to be DX-accelerated, otherwise it not works. :) There could be not much effects, but they are here.

Hello. I had this same problem playing a game called Farie Solitaire. Since the problem with TAG was almost exactly same as the problem I had with Faerie Solitaire, I tried the fix I used with Faerie Solitaire with TAG and it worked!

Right click TAG-> Click Properties -> Add "-DIB" at the end of target(has to be capitalized).

Thank you, sangadoria! It's been working like a charm so far.
-DIB = Turns off both DirectX and Use VRAM options.

EDIT: the game shows me complete white screen(no flashing this time, though...), right after going out of grandma's house. sigh...
----------------
xp sp3, core2duo E8400, 2GB, EP45-UD3LR, 9600GT 512MB(driver ver. 296.10)

I've got similar behavior on my copy, except that upon exiting grandma's house, the screen was a nice creamy green with a black pulsing circle. Poking around the starting area leads me to believe that this particular issue is from a masking layer, which is unintentionally intense due to the disabling of DX. I was able to endure the flicker long enough to confirm that this is not an issue for me with DX enabled.

Some screen captures to demonstrate...

hi, MForey,
Your description and the .gif are just the same as I have seen on my screen.
With DX enabled, yes, I am able to see the outside scene behind the annoying white flashing screen, too.

It might be related to some kind of latency thing or 9600GT's driver.
As a super long shot, to put "/usepmtimer" in boot.ini might work.
(http://support.microsoft.com/kb/895980)

If everyone could write down his/her PC spec, it could narrow down what the cause is, I guess.
----------------
xp sp3, core2duo E8400, 2GB, EP45-UD3LR, 9600GT 512MB(driver ver. 296.10)

I use Nvidia GeForce 8500 GT driver

My computer runs XP SP3, AMD Phenom II X4 955, 3.25GB RAM, NVidia GTS250