The way you could do that is by making it so after picking up a weapon you could make it so they can't switch weapons for say, 5 seconds. I have done the weapon merging glitch with the smaw and hive cannon and know how it's done... So trust me on this one.
The solution is to use better coding. The glitch doesn't exist because you switch weapons quickly, it exists because of bad programming. --- Do unto others as you would have them do unto you Basically, if you get spanked, turn the other cheek
I think Tony probably knows how it's done. I'd wager it was fixed ages and ages ago. --- 2% of GameFAQs users have this in their signature. If you're one of the 98% that doesn't, copy and paste this into your signature.