It is yes, its laziness on Rockstar's part. Thing that really pissed me off with TBoGT was the fact that half the new vehicles were for multiplayer only (stinger, buffalo cruiser, police bike) and I wasn't a happy bunny.
As much as I like modders, they tend to like to piss everyone off and freee the game out, its the only problem I have with them. I am an Xbox360 player and the freezing is beyond a joke, it came to a point where an individual modder was stalking me into games to freeze me out!
But, thanks for your help.
(The BATI CUSTOM