@Jawadali : Yes, I Bought a lot of LightGuns for PS2. I have 11 Lightguns fos PS2 (Most of them I have repeated, because I have two Hands LOL.)
About Your LightGun : I think It is TOO CHEAP. That is a "P99G2 Blaster" Clone ( from Logic 3). I do not Think it is very Accurate. Nobody gives Free items. If Accuracy is the price we must pay, I do not doubt to pay for a Good accurate LightGun. If you are planning to use this Driver. I Would recommend a SCORPION3 (from blaze) just for 15$ more. This One Tracks WONDERFULLY if calibrated properly. And you have a Laser Pointing. It is a shame because Scorpion 3 Has NO RECOIL-KICKBACK. With a little Brighness increase it tracks PERFECTLY on BLACK areas. The gun you are planning to buy requires quite brightness Screen.
About Drivers :
<<Has anyone tried using this on windows 98>> Authors said that it works in Just in XP. I tested in Windows2000 with Success (Wingun). And in windows 98 it failed me, but it could be because it was an old machine. Try it, it is not too hard.
<<Do you guys have both "Guncon2Mouse" and "WinGun">> Authors says that driver "overwrites" one from other so you can use only the LAST you installed. I Use WINGUN, because I can Calibrate SUPER EASY, it doesn