It sounds just like it did in the E3 beta for GTA3.

Game 100% complete, more special missions, and the finished story, all vehicles and weapons unlocked.

100% FILE FOR GTA 3 .......................................

Converts the cash from GTAIV for GTAIII. Replaces: Cash(Money)

Found in old map files, also exist in PS2 ver. of GTA3

HD road textures for use with Grand Theft Auto III.

This is for those who cant find all the hidden packages.

Due to the lack of a "Never Wanted Cheat" like in VC and SA, I wrote this little script. Just copy the extracted contents to your GTAIIICLEO Folder. Press the F11 button ingame to toggle it on/off. There's also a text box appearing like ...